GPIO Map
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This map details the usage of each GPIO pin on the 5536. (Last updated January 09, 2007 for B1):
| PIN | Usage | Input | Output | Notes | OUTPUT_ENABLE | OUT_AUX1 | OUT_AUX2 | INPUT_ENABLE | IN_AUX1 | INPUT_EVENT_ENABLE |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | AC_BEEP | X | Connected to PCSPK | X | X | |||||
| 2 | GPIO2 | X | Reads memory strap | X | ||||||
| 3 | VGA SCL | - | - | EDID line - not needed for XO machine | ||||||
| 4 | VGA SDA | - | - | EDID line - not needed for XO machine | ||||||
| 5 | DCONSTAT0 | X | DCON status pin (1 of 2) | X | ||||||
| 6 | DCONSTAT1 | X | DCON status pin (2 of 2) | X | ||||||
| 7 | DCONIRQ | X | DCON Interrupt PIN | X | X | |||||
| 8 | UART1_TX | X | UART Transmit | X | X | |||||
| 9 | UART1_RX | X | UART Receive | X | X | |||||
| 10 | UNUSED | - | - | Goes to test point | ||||||
| 11 | DCONLOAD | X | Output indicator for DCON | X | ||||||
| 12 | DCONBLNK | X | DCON Signal | X | ||||||
| 13 | SMI# | X | SMI# pin to the GX | X | ||||||
| 14 | SMB_CLK | - | - | SMBus clock | X | X | X | |||
| 15 | SMB_DATA | - | - | SMBus data | X | X | X | |||
| 16 | LPC_AD0 | - | - | Defaults to LPC - no GPIO control | ||||||
| 17 | LPC_AD1 | - | - | Defaults to LPC - no GPIO control | ||||||
| 18 | LPC_AD2 | - | - | Defaults to LPC - no GPIO control | ||||||
| 19 | LPC_AD3 | - | - | Defaults to LPC - no GPIO control | ||||||
| 20 | LPC_DRQ_L | - | - | Defaults to LPC - no GPIO control | ||||||
| 21 | LPC_SERIRQ | - | - | Defaults to LPC - no GPIO control | ||||||
| 22 | LPC_FRAME_L | - | - | Defaults to LPC - no GPIO control | ||||||
| 24 | WORK_AUX | X | Xontrols MAIN_ON (which controls VCORE_CPU) | X | X | |||||
| 25 | - | - | - | Unknown - line is SWI# goes into GPIO2 on the EC | ||||||
| 26 | UNUSED | - | - | Goes to test point | ||||||
| 27 | - | - | - | Unknown - line is SCI# goes into GPIO5/SCI# on the EC | ||||||
| 28 | PWR_BUT# | X | Power button input | X | X |
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