0.0.10 Documentation checkpoint.

The vast majority of the Maple-specific values have been pulled out of
the higher-level overview pages and replaced with refs into documents
under /docs/source/hardware/.

Much of the work that's left to be done in this regard is labeled with
versioned TODO and FIXME comments.

Suggestions from StephenFromNYC and gbulmer were incorporated from
this forum thread:

      http://forums.leaflabs.com/topic.php?id=703

2 files changed, 463 insertions, 23 deletions

diff --git a/source/hardware/maple-ret6.rst b/source/hardware/maple-ret6.rst
new file mode 100644
index 0000000..06dcaff
--- /dev/null
+++ b/source/hardware/maple-ret6.rst
@@ -0,0 +1,276 @@
+.. highlight:: sh
+
+.. _maple-ret6:
+
+Maple RET6 Edition
+==================
+
+.. contents:: Contents
+   :local:
+
+Technical Specifications
+------------------------
+
+    * MCU: **STM32F103RET6**, a 32-bit ARM Cortex M3 microprocessor
+    * Clock Speed: **72 MHz**
+    * Operating Voltage: 3.3V
+    * Input Voltage (recommended): 3V-12V
+    * 39 Digital I/O Pins (:ref:`GPIO <gpio>`)
+    * 16 Analog Input pins, 12 bit **ADC** resolution (:ref:`ADC <adc>`)
+    * 15 **PWM** pins at 16-bit resolution (:ref:`PWM <pwm>`)
+    * Dedicated **USB** port for programming and communications (:ref:`USB<usb>`)
+    * External **JTAG** interface (:ref:`JTAG <jtag>`)
+    * **512KB Flash** and **64KB SRAM**
+    * 64 Channel nested vector interrupt handler (including external interrupt on GPIOs)
+    * Integrated **SPI** (:ref:`SPI <spi>`)
+    * Integrated **I2C** (:ref:`I2C <i2c>`)
+    * 12 Channels of Direct Memory Access (**DMA**)
+    * 3 **USART** and 2 **UART** devices (:ref:`USART <usart>`)
+    * Six 4-channel and two basic **timers** (:ref:`Timers <timers>`)
+    * Supplies up to 800mA @ 3.3v
+    * Support for low power and sleep modes (<500uA)
+    * Dimensions are 2.05″x2.1″
+
+.. _maple-ret6-powering:
+
+Powering the Maple RET6 Edition
+-------------------------------
+
+The Maple RET6 Edition's power source is determined by the header to
+the left of the "LeafLabs" label on the silkscreen.  The RET6 Edition
+can be powered from the barrel jack connector, USB, or a LiPo battery.
+We ship the RET6 Edition with a jumper on the USB selector.  In order
+to power it off of an alternative source, unplug the board, then move
+the jumper to the desired selector before reconnecting power.
+
+You can also power the Maple via the pin labeled "Vin" on the lower
+header.  However, don't do this while simultaneously powering the
+board from another source, or you could damage the it.
+
+Using the Built-in Battery Charger
+----------------------------------
+
+The RET6 Edition has a built-in LiPo battery charger.  In order to use
+it, put a jumper across the CHRG header on the power selection header
+and across the USB, or EXT selectors, depending on whether you're
+charging the battery via USB cable or barrel jack connector.  The LED
+labeled CHRG will light up while the battery is being charged.  When
+the battery is finished charging, the LED labeled DONE will also light
+up.
+
+.. _maple-ret6-gpios:
+
+GPIO Information
+----------------
+
+The RET6 Edition features 38 ready-to-use general purpose input/output
+(GPIO) pins for digital input/output, numbered ``D0`` through ``D37``.
+These numbers correspond to the numeric values next to each header on
+the Maple silkscreen.  More GPIOs (numbered ``D39``\ --``43``) are
+available through use in combination with the
+:ref:`lang-disabledebugports` function; see the :ref:`board-specific
+debug pin constants <lang-board-values-debug>` for more information.
+
+.. TODO [0.1.0] silkscreen pictures which expand abbreviations
+
+.. _maple-ret6-pin-map-master:
+
+Master Pin Map
+^^^^^^^^^^^^^^
+
+.. TODO [0.0.10] Update from base Maple information
+
+This table shows the available functionality on every GPIO pin, by
+peripheral type. The "STM32" column refers to the port and number that
+the header is connected to on the microcontroller.  The "5V?" column
+documents whether or not the pin is 5 volt tolerant.
+
+.. csv-table::
+   :header: "Pin", "STM32", ":ref:`ADC <adc>`", ":ref:`Timer <timers>`", ":ref:`I2C <i2c>`", ":ref:`UART <usart>`", ":ref:`SPI <spi>`", "5v?"
+
+   "D0",  "PA3",  "ADC3",  "TIM2_CH4",     "-",          "USART2_RX",  "-",         "No"
+   "D1",  "PA2",  "ADC2",  "TIM2_CH3",     "-",          "USART2_TX",  "-",         "No"
+   "D2",  "PA0",  "ADC0",  "TIM2_CH1_ETR", "-",          "USART2_CTS", "-",         "No"
+   "D3",  "PA1",  "ADC1",  "TIM2_CH2",     "-",          "USART2_RTS", "-",         "No"
+   "D4",  "PB5",  "-",     "-",            "ISC1_SMBA",  "-",          "-",         "No"
+   "D5",  "PB6",  "-",     "TIM4_CH1",     "I2C1_SCL",   "-",          "-",         "Yes"
+   "D6",  "PA8",  "-",     "TIM1_CH1",     "-",          "USART1_CK",  "-",         "Yes"
+   "D7",  "PA9",  "-",     "TIM1_CH2",     "-",          "USART1_TX",  "-",         "Yes"
+   "D8",  "PA10", "-",     "TIM1_CH3",     "-",          "USART1_RX",  "-",         "Yes"
+   "D9",  "PB7",  "-",     "TIM4_CH2",     "I2C1_SDA",   "-",          "-",         "Yes"
+   "D10", "PA4",  "ADC4",  "-",            "-",          "USART2_CK",  "SPI1_NSS",  "No"
+   "D11", "PA7",  "ADC7",  "TIM3_CH2",     "-",          "-",          "SPI1_MOSI", "No"
+   "D12", "PA6",  "ADC6",  "TIM3_CH1",     "-",          "-",          "SPI1_MISO", "No"
+   "D13", "PA5",  "ADC5",  "-",            "-",          "-",          "SPI1_SCK",  "No"
+   "D14", "PB8",  "-",     "TIM4_CH3",     "-",          "-",          "-",         "Yes"
+   "D15", "PC0",  "ADC10", "-",            "-",          "-",          "-",         "No"
+   "D16", "PC1",  "ADC11", "-",            "-",          "-",          "-",         "No"
+   "D17", "PC2",  "ADC12", "-",            "-",          "-",          "-",         "No"
+   "D18", "PC3",  "ADC13", "-",            "-",          "-",          "-",         "No"
+   "D19", "PC4",  "ADC14", "-",            "-",          "-",          "-",         "No"
+   "D20", "PC5",  "ADC15", "-",            "-",          "-",          "-",         "No"
+   "D21", "PC13", "-",     "-",            "-",          "-",          "-",         "No"
+   "D22", "PC14", "-",     "-",            "-",          "-",          "-",         "No"
+   "D23", "PC15", "-",     "-",            "-",          "-",          "-",         "No"
+   "D24", "PB9",  "-",     "TIM4_CH4",     "-",          "-",          "-",         "Yes"
+   "D25", "PD2",  "-",     "TIM3_ETR",     "-",          "-",          "-",         "Yes"
+   "D26", "PC10", "-",     "-",            "-",          "-",          "-",         "Yes"
+   "D27", "PB0",  "ADC8",  "TIM3_CH3",     "-",          "-",          "-",         "No"
+   "D28", "PB1",  "ADC9",  "TIM3_CH4",     "-",          "-",          "-",         "No"
+   "D29", "PB10", "-",     "-",            "I2C2_SCL",   "USART3_TX",  "-",         "Yes"
+   "D30", "PB11", "-",     "-",            "I2C2_SDA",   "USART3_RX",  "-",         "Yes"
+   "D31", "PB12", "-",     "TIM1_BKIN",    "I2C2_SMBA",  "USART3_CK",  "SPI2_NSS",  "Yes"
+   "D32", "PB13", "-",     "TIM1_CH1N",    "-",          "USART3_CTS", "SPI2_SCK",  "Yes"
+   "D33", "PB14", "-",     "TIM1_CH2N",    "-",          "USART3_RTS", "SPI2_MISO", "Yes"
+   "D34", "PB15", "-",     "TIM1_CH3N",    "-",          "-",          "SPI2_MOSI", "Yes"
+   "D35", "PC6",  "-",     "-",            "-",          "-",          "-",         "Yes"
+   "D36", "PC7",  "-",     "-",            "-",          "-",          "-",         "Yes"
+   "D37", "PC8",  "-",     "-",            "-",          "-",          "-",         "Yes"
+
+.. TODO [0.0.10] Another table for the JTAG pins
+
+Timer Pin Map
+^^^^^^^^^^^^^
+
+.. TODO [0.0.10] Add Timer 5,6,7,8 information
+
+The following table shows what pins are associated with a particular
+timer's capture/compare channels.
+
+.. csv-table::
+   :header: Timer, Ch. 1, Ch. 2, Ch. 3, Ch. 4
+   :delim: |
+
+   1 | D6  | D7  | D8  | -
+   2 | D2  | D3  | D1  | D0
+   3 | D12 | D11 | D27 | D28
+   4 | D5  | D9  | D14 | D24
+
+.. _maple-ret6-exti-map:
+
+EXTI Line Pin Map
+^^^^^^^^^^^^^^^^^
+
+The following table shows which pins connect to which :ref:`EXTI lines
+<external-interrupts-exti-line>` on the Maple RET6 Edition.
+
+.. list-table::
+   :widths: 1 1
+   :header-rows: 1
+
+   * - EXTI Line
+     - Pins
+   * - EXTI0
+     - 2, 15, 27
+   * - EXTI1
+     - 3, 16, 28
+   * - EXTI2
+     - 1, 17, 25
+   * - EXTI3
+     - 0, 18
+   * - EXTI4
+     - 10, 19
+   * - EXTI5
+     - 4, 13, 20
+   * - EXTI6
+     - 5, 12, 35
+   * - EXTI7
+     - 9, 11, 36
+   * - EXTI8
+     - 6, 14, 37
+   * - EXTI9
+     - 7, 25, 28
+   * - EXTI10
+     - 8, 26, 29
+   * - EXTI11
+     - 30
+   * - EXTI12
+     - 31
+   * - EXTI13
+     - 21, 32
+   * - EXTI14
+     - 22, 33
+   * - EXTI15
+     - 23, 34
+
+.. _maple-ret6-usart-map:
+
+USART Pin Map
+^^^^^^^^^^^^^
+
+.. FIXME [0.0.10] UART4 and UART5 information
+
+The Maple RET6 Edition has three serial ports (also known as a UARTs
+or USARTs): ``Serial1``, ``Serial2``, and ``Serial3``. They
+communicate using the pins summarized in the following table:
+
+.. csv-table::
+   :header: Serial Port, TX, RX, CK, CTS, RTS
+   :delim: |
+
+   ``Serial1`` | 7  | 8  | 6  | -  | -
+   ``Serial2`` | 1  | 0  | 10 | 2  | 3
+   ``Serial3`` | 29 | 30 | 31 | 32 | 33
+
+Board-Specific Values
+---------------------
+
+.. TODO [0.0.10]
+
+Stub.
+
+Hardware Design Files
+---------------------
+
+The hardware schematics and board layout files are available in the
+`Maple Github repository <https://github.com/leaflabs/maple>`_.  Other
+than the processor used, the design files for the Maple RET6 edition
+are identical to the Maple Rev 5, which are in the ``maple-r5``
+subdirectory of the Maple repository.  A schematic for a JTAG adapter
+suitable for use with Maple is available in the ``jtagadapter``
+directory.
+
+From the Github repository main page, you can download the entire
+repository by clicking the "Download" button.  If you are familiar
+with `git <http://git-scm.com/>`_, you can also clone the repository
+at the command line with ::
+
+    $ git clone git://github.com/leaflabs/maple.git
+
+.. _maple-ret6-failure-modes:
+
+Failure Modes
+-------------
+
+The following known failure modes apply to all Maple boards.  The
+failure modes aren't design errors, but are easy ways to break or
+damage your board permanently.
+
+* **High voltage on non-tolerant pins**: not all header pins are 5V
+  compatible; so e.g. connecting certain serial devices in the wrong
+  way could over-voltage the pins.  The :ref:`pin-mapping master table
+  <maple-ret6-pin-map-master>` details which pins are 5V-tolerant.
+
+Errata
+------
+
+This section lists known issues and warnings for the Maple RET6 Edition.
+
+* **DAC, UART4, UART5 GPIOs unavailable**: Pins related to the digital
+  to analog converter (DAC) and UARTs 4 and 5 are not broken out to
+  headers.  The RET6 Edition's hardware layout is identical to that of
+  the Maple Rev 5, which wasn't designed for use with these
+  STM32F103RET6-only peripherals.
+
+Recommended Reading
+-------------------
+
+* STMicro documentation for STM32F103RE microcontroller:
+
+    * `Datasheet
+      <http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00191185.pdf>`_ (PDF)
+    * `Reference Manual
+      <http://www.st.com/stonline/products/literature/rm/13902.pdf>`_ (PDF)
+    * `Programming Manual
+      <http://www.st.com/stonline/products/literature/pm/15491.pdf>`_
+      (PDF; assembly language and register reference)
diff --git a/source/hardware/maple.rst b/source/hardware/maple.rst
index 1fa4f3f..44848a7 100644
--- a/source/hardware/maple.rst
+++ b/source/hardware/maple.rst
@@ -1,6 +1,6 @@
 .. highlight:: sh
 
-.. _hardware-maple:
+.. _maple:
 
 Maple
 =====
@@ -16,15 +16,14 @@ Technical Specifications
     * Operating Voltage: 3.3V
     * Input Voltage (recommended): 3V-12V
     * 39 Digital I/O Pins (:ref:`GPIO <gpio>`)
-    * 16 Analog Input Pins 
-    * 12-bit **ADC** resolution (:ref:`ADC <adc>`)
+    * 16 Analog Input Pins, 12-bit **ADC** resolution (:ref:`ADC <adc>`)
     * 15 **PWM** pins at 16-bit resolution (:ref:`PWM <pwm>`)
-    * Dedicated **USB** port for programming and communications (:ref:`USB<usb>`)
-    * External **JTAG** interface (:ref:`USB <jtag>`)
-    * **128 Flash** and **20KB SRAM**
+    * Dedicated **USB** port for programming and communications (:ref:`USB <usb>`)
+    * External **JTAG** interface (:ref:`JTAG <jtag>`)
+    * **128KB Flash** and **20KB SRAM**
     * 64 Channel nested vector interrupt handler (including external interrupt on GPIOs)
-    * Integrated **SPI** (:ref:`SPI<spi>`)
-    * Integrated **I2C** (:ref:`I2C<i2c>`)
+    * Integrated **SPI** (:ref:`SPI <spi>`)
+    * Integrated **I2C** (:ref:`I2C <i2c>`)
     * 7 Channels of Direct Memory Access (**DMA**)
     * 3 **USART** divices (:ref:`USART <usart>`)
     * Four 4-channel **timers** (:ref:`Timers <timers>`)
@@ -32,7 +31,7 @@ Technical Specifications
     * Support for low power and sleep modes (<500uA)
     * Dimensions are 2.05″x2.1″
 
-.. _maple-hardware-identify-rev:
+.. _maple-identify-rev:
 
 Identifying your Rev
 --------------------
@@ -79,7 +78,7 @@ have a light red silkscreen and a single pixelated leaf as a logo.
    :align: center
    :alt: Maple Rev 1
 
-.. _hardware-maple-powering:
+.. _maple-powering:
 
 Powering the Maple
 ------------------
@@ -106,17 +105,174 @@ connector.  The LED labeled CHRG will light up while the battery is
 being charged.  When the battery is finished charging, the LED labeled
 DONE will also light up.
 
+.. _maple-gpios:
+
+GPIO Information
+----------------
+
+The Maple features 38 ready-to-use general purpose input/output (GPIO)
+pins for digital input/output, numbered ``D0`` through ``D37``.  These
+numbers correspond to the numeric values next to each header on the
+Maple silkscreen.  More GPIOs (numbered ``D39``\ --``43``) are
+available through use in combination with the
+:ref:`lang-disabledebugports` function; see the :ref:`board-specific
+debug pin constants <lang-board-values-debug>` for more information.
+
+.. TODO [0.1.0] silkscreen pictures which expand abbreviations
+
+.. _maple-pin-map-master:
+
+Master Pin Map
+^^^^^^^^^^^^^^
+
+This table shows the available functionality on every GPIO pin, by
+peripheral type. The "STM32" column refers to the port and number that
+the header is connected to on the microcontroller.  The "5V?" column
+documents whether or not the pin is 5 volt tolerant.
+
+.. csv-table::
+   :header: "Pin", "STM32", ":ref:`ADC <adc>`", ":ref:`Timer <timers>`", ":ref:`I2C <i2c>`", ":ref:`UART <usart>`", ":ref:`SPI <spi>`", "5v?"
+
+   "D0",  "PA3",  "ADC3",  "TIM2_CH4",     "-",          "USART2_RX",  "-",         "No"
+   "D1",  "PA2",  "ADC2",  "TIM2_CH3",     "-",          "USART2_TX",  "-",         "No"
+   "D2",  "PA0",  "ADC0",  "TIM2_CH1_ETR", "-",          "USART2_CTS", "-",         "No"
+   "D3",  "PA1",  "ADC1",  "TIM2_CH2",     "-",          "USART2_RTS", "-",         "No"
+   "D4",  "PB5",  "-",     "-",            "ISC1_SMBA",  "-",          "-",         "No"
+   "D5",  "PB6",  "-",     "TIM4_CH1",     "I2C1_SCL",   "-",          "-",         "Yes"
+   "D6",  "PA8",  "-",     "TIM1_CH1",     "-",          "USART1_CK",  "-",         "Yes"
+   "D7",  "PA9",  "-",     "TIM1_CH2",     "-",          "USART1_TX",  "-",         "Yes"
+   "D8",  "PA10", "-",     "TIM1_CH3",     "-",          "USART1_RX",  "-",         "Yes"
+   "D9",  "PB7",  "-",     "TIM4_CH2",     "I2C1_SDA",   "-",          "-",         "Yes"
+   "D10", "PA4",  "ADC4",  "-",            "-",          "USART2_CK",  "SPI1_NSS",  "No"
+   "D11", "PA7",  "ADC7",  "TIM3_CH2",     "-",          "-",          "SPI1_MOSI", "No"
+   "D12", "PA6",  "ADC6",  "TIM3_CH1",     "-",          "-",          "SPI1_MISO", "No"
+   "D13", "PA5",  "ADC5",  "-",            "-",          "-",          "SPI1_SCK",  "No"
+   "D14", "PB8",  "-",     "TIM4_CH3",     "-",          "-",          "-",         "Yes"
+   "D15", "PC0",  "ADC10", "-",            "-",          "-",          "-",         "No"
+   "D16", "PC1",  "ADC11", "-",            "-",          "-",          "-",         "No"
+   "D17", "PC2",  "ADC12", "-",            "-",          "-",          "-",         "No"
+   "D18", "PC3",  "ADC13", "-",            "-",          "-",          "-",         "No"
+   "D19", "PC4",  "ADC14", "-",            "-",          "-",          "-",         "No"
+   "D20", "PC5",  "ADC15", "-",            "-",          "-",          "-",         "No"
+   "D21", "PC13", "-",     "-",            "-",          "-",          "-",         "No"
+   "D22", "PC14", "-",     "-",            "-",          "-",          "-",         "No"
+   "D23", "PC15", "-",     "-",            "-",          "-",          "-",         "No"
+   "D24", "PB9",  "-",     "TIM4_CH4",     "-",          "-",          "-",         "Yes"
+   "D25", "PD2",  "-",     "TIM3_ETR",     "-",          "-",          "-",         "Yes"
+   "D26", "PC10", "-",     "-",            "-",          "-",          "-",         "Yes"
+   "D27", "PB0",  "ADC8",  "TIM3_CH3",     "-",          "-",          "-",         "No"
+   "D28", "PB1",  "ADC9",  "TIM3_CH4",     "-",          "-",          "-",         "No"
+   "D29", "PB10", "-",     "-",            "I2C2_SCL",   "USART3_TX",  "-",         "Yes"
+   "D30", "PB11", "-",     "-",            "I2C2_SDA",   "USART3_RX",  "-",         "Yes"
+   "D31", "PB12", "-",     "TIM1_BKIN",    "I2C2_SMBA",  "USART3_CK",  "SPI2_NSS",  "Yes"
+   "D32", "PB13", "-",     "TIM1_CH1N",    "-",          "USART3_CTS", "SPI2_SCK",  "Yes"
+   "D33", "PB14", "-",     "TIM1_CH2N",    "-",          "USART3_RTS", "SPI2_MISO", "Yes"
+   "D34", "PB15", "-",     "TIM1_CH3N",    "-",          "-",          "SPI2_MOSI", "Yes"
+   "D35", "PC6",  "-",     "-",            "-",          "-",          "-",         "Yes"
+   "D36", "PC7",  "-",     "-",            "-",          "-",          "-",         "Yes"
+   "D37", "PC8",  "-",     "-",            "-",          "-",          "-",         "Yes"
+
+.. TODO [0.0.10] JTAG pins
+
+Timer Pin Map
+^^^^^^^^^^^^^
+
+The following table shows what pins are associated with a particular
+timer's capture/compare channels.
+
+.. csv-table::
+   :header: Timer, Ch. 1, Ch. 2, Ch. 3, Ch. 4
+   :delim: |
+
+   1 | D6  | D7  | D8  | -
+   2 | D2  | D3  | D1  | D0
+   3 | D12 | D11 | D27 | D28
+   4 | D5  | D9  | D14 | D24
+
+.. _maple-exti-map:
+
+EXTI Line Pin Map
+^^^^^^^^^^^^^^^^^
+
+The following table shows which pins connect to which :ref:`EXTI lines
+<external-interrupts-exti-line>` on the Maple.
+
+.. list-table::
+   :widths: 1 1
+   :header-rows: 1
+
+   * - EXTI Line
+     - Pins
+   * - EXTI0
+     - 2, 15, 27
+   * - EXTI1
+     - 3, 16, 28
+   * - EXTI2
+     - 1, 17, 25
+   * - EXTI3
+     - 0, 18
+   * - EXTI4
+     - 10, 19
+   * - EXTI5
+     - 4, 13, 20
+   * - EXTI6
+     - 5, 12, 35
+   * - EXTI7
+     - 9, 11, 36
+   * - EXTI8
+     - 6, 14, 37
+   * - EXTI9
+     - 7, 25, 28
+   * - EXTI10
+     - 8, 26, 29
+   * - EXTI11
+     - 30
+   * - EXTI12
+     - 31
+   * - EXTI13
+     - 21, 32
+   * - EXTI14
+     - 22, 33
+   * - EXTI15
+     - 23, 34
+
+.. _maple-usart-map:
+
+USART Pin Map
+^^^^^^^^^^^^^
+
+.. FIXME [0.0.10] UART4, UART5
+
+The Maple has three serial ports (also known as a UARTs or USARTs):
+``Serial1``, ``Serial2``, and ``Serial3``. They communicate using the
+pins summarized in the following table:
+
+.. csv-table::
+   :header: Serial Port, TX, RX, CK, CTS, RTS
+   :delim: |
+
+   ``Serial1`` | 7  | 8  | 6  | -  | -
+   ``Serial2`` | 1  | 0  | 10 | 2  | 3
+   ``Serial3`` | 29 | 30 | 31 | 32 | 33
+
+Board-Specific Values
+---------------------
+
+.. TODO [0.0.10]
+
+Stub.
+
 Hardware Design Files
 ---------------------
 
 The hardware schematics and board layout files are available in the
-`Maple github repository <https://github.com/leaflabs/maple>`_.  The
+`Maple Github repository <https://github.com/leaflabs/maple>`_.  The
 design files for Rev 1, Rev 3, and Rev 5 are respectively in the
 ``maple-r1``, ``maple-r3``, and ``maple-r5`` subdirectories.  A
 schematic for a JTAG adapter suitable for use with Maple is available
 in the ``jtagadapter`` directory.
 
-From the github repository main page, you can download the entire
+From the Github repository main page, you can download the entire
 repository by clicking the "Download" button.  If you are familiar
 with `git <http://git-scm.com/>`_, you can also clone the repository
 at the command line with ::
@@ -128,14 +284,14 @@ at the command line with ::
 Failure Modes
 -------------
 
-The following known failure modes apply to all Maple versions.  The
-failure modes aren't design errors, but are easy ways to break or
-damage your board permanently.
+The following are known failure modes.  The failure modes aren't
+design errors, but are easy ways to break or damage your board
+permanently.
 
 * **High voltage on non-tolerant pins**: not all header pins are 5V
   compatible; so e.g. connecting certain serial devices in the wrong
-  way could over-voltage the pins.  The :ref:`Pin-Mapping Mega Table
-  <pin-mapping-mega-table>` details which pins are 5V-tolerant.
+  way could over-voltage the pins.  The :ref:`pin-mapping master table
+  <maple-pin-map-master>` details which pins are 5V-tolerant.
 
 Errata
 ------
@@ -145,16 +301,18 @@ Maple board.
 
 Rev 5
 ^^^^^
-Known issues:
 
-* **Pin 3 AIN missing**: Pin 3 is capable of analog input, but on
-  boards sold in during Fall 2010, the corresponding "AIN" is missing
+* **Pin 3 AIN missing**: Pin 3 is capable of analog input, but on Rev
+  5s manufactured during Fall 2010, the corresponding "AIN" is missing
   from its silkscreen.  This mistake was fixed in later manufacturing
   runs.
 
 Rev 3
 ^^^^^
 
+* **Pin 3 AIN missing**: Pin 3 is capable of analog input, but the
+  corresponding "AIN" is missing from the Rev 3 silkscreen.
+
 * **Bad/Sticky Buttons**: a number of Rev 3 boards sold in May-June 2010
   have questionable RESET and BUT buttons.
 
@@ -231,9 +389,15 @@ Recommended Reading
 
 * STMicro documentation for STM32F103RB microcontroller:
 
-    * `Datasheet <http://www.st.com/stonline/products/literature/ds/13587.pdf>`_ (pdf)
-    * `Reference Manual <http://www.st.com/stonline/products/literature/rm/13902.pdf>`_ (pdf)
-    * `Programming Manual <http://www.st.com/stonline/products/literature/pm/15491.pdf>`_ (assembly language and register reference)
+    * `Datasheet
+      <http://www.st.com/stonline/products/literature/ds/13587.pdf>`_
+      (PDF)
+    * `Reference Manual
+      <http://www.st.com/stonline/products/literature/rm/13902.pdf>`_
+      (PDF)
+    * `Programming Manual
+      <http://www.st.com/stonline/products/literature/pm/15491.pdf>`_
+      (PDF; assembly language and register reference)
 
 .. rubric:: Footnotes