From 7b91c6d56f8c6abff4f37e40fb9f8bf21244f91d Mon Sep 17 00:00:00 2001
From: Dominic Spill <dominicgs@gmail.com>
Date: Wed, 7 Sep 2016 17:32:51 +0100
Subject: [PATCH] Add expansion header tables to make life easier for the
 curious

---
 HackRF-One.md | 121 ++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 113 insertions(+), 8 deletions(-)

diff --git a/HackRF-One.md b/HackRF-One.md
index f6b77a8..cb60f0d 100644
--- a/HackRF-One.md
+++ b/HackRF-One.md
@@ -86,19 +86,124 @@ HackRF One uses CLKIN instead of the internal crystal when a clock signal is det
 
 To verify that a signal has been detected on CLKIN, use `hackrf_si5351c -n 0 -r`.  The expected output with a clock detected is `[  0] -> 0x01`.  The expected output with no clock detected is `[  0] -> 0x51`.
 
+## Hardware Documentation
+
+Schematic diagram, assembly diagram,and bill of materials can be found at [https://github.com/mossmann/hackrf/tree/master/doc/hardware](https://github.com/mossmann/hackrf/tree/master/doc/hardware)
+
 ## Expansion Interface
 
 The HackRF One expansion interface consists of headers P9, P20, P22, and P28.  These four headers are installed on the commercial HackRF One from Great Scott Gadgets.
 
-* P9 BASEBAND: A direct analog interface to the high speed dual ADC and dual DAC.
-* P20 GPIO: GPIO, ADC, RTC, and power.
-* P22 I2S: I2S, SPI, I2C, UART, GPIO, and clocks.
-* P28 SD: SDIO, GPIO, clocks, and CPLD.
+### P9 Baseband
+A direct analog interface to the high speed dual ADC and dual DAC.
 
-Refer to the schematics and component documentation for more information.
+Pin|Function
+---|--------
+1 | GND
+2 | GND
+3 | GND
+4 | RXBBQ-
+5 | RXBBI-
+6 | RXBBQ+
+7 | RXBBI+
+8 | GND
+9 | GND
+10 | TXBBI-
+11 | TXBBQ+
+12 | TXBBI+
+13 | TXBBQ-
+14 | GND
+15 | GND
+16 | GND
+
+### P20 GPIO
+Providing access to GPIO, ADC, RTC, and power.
+
+Pin|Function
+---|--------
+1 | VBAT
+2 | RTC_ALARM
+3 | VCC
+4 | WAKEUP
+5 | GPIO3_8
+6 | GPIO3_0
+7 | GPIO3_10
+8 | GPIO3_11
+9 | GPIO3_12
+10 | GPIO3_13
+11 | GPIO3_14
+12 | GPIO3_15
+13 | GND
+14 | ADC0_6
+15 | GND
+16 | ADC0_2
+17 | VBUSCTRL
+18 | ADC0_5
+19 | GND
+20 | ADC0_0
+21 | VBUS
+22 | VIN
+
+### P22 I2S
+I2S, SPI, I2C, UART, GPIO, and clocks.
+
+Pin|Function
+---|--------
+1 | CLKOUT
+2 | CLKIN
+3 | RESET
+4 | GND
+5 | I2C1_SCL
+6 | I2C1_SDA
+7 | SPIFI_MISO
+8 | SPIFI_SCK
+9 | SPIFI_MOSI
+10 | GND
+11 | VCC
+12 | I2S0_RX_SCK
+13 | I2S_RX_SDA
+14 | I2S0_RX_MCLK
+15 | I2S0_RX_WS
+16 | I2S0_TX_SCK
+17 | I2S0_TX_MCLK
+18 | GND
+19 | U0_RXD
+20 | U0_TXD
+21 | P2_9
+22 | P2_13
+23 | P2_8
+24 | SDA
+25 | CLK6
+26 | SCL
+
+### P28 SD
+SDIO, GPIO, clocks, and CPLD.
+
+Pin|Function
+---|--------
+1 | VCC
+2 | GND
+3 | SD_CD
+4 | SD_DAT3
+5 | SD_DAT2
+6 | SD_DAT1
+7 | SD_DAT0
+8 | SD_VOLT0
+9 | SD_CMD
+10 | SD_POW
+11 | SD_CLK
+12 | GND
+13 | GCK2
+14 | GCK1
+15 | B1AUX14
+16 | B1AUX13
+17 | CPLD_TCK
+18 | BANK2F3M2
+19 | CPLD_TDI
+20 | BANK2F3M6
+21 | BANK2F3M12
+22 | BANK2F3M4
 
 Additional unpopulated headers and test points are available for test and development, but they may be incompatible with some enclosure or expansion options.
 
-## Hardware Documentation
-
-Schematic diagram, assembly diagram,and bill of materials can be found at [https://github.com/mossmann/hackrf/tree/master/doc/hardware](https://github.com/mossmann/hackrf/tree/master/doc/hardware)
\ No newline at end of file
+Refer to the schematics and component documentation for more information.
\ No newline at end of file