GPIO Map

From OLPC

Revision as of 05:48, 11 March 2007 by Xavi (Talk | contribs)
(diff) ← Older revision | Current revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Current GPIO Map

This map details the usage of each GPIO pin on the 5536. (Last updated March 8, 2007): If blank, B1 and A are the same as B2.

PIN B2 Usage B1 A In Out Notes OUTPUT
_ENABLE
OUT
_AUX1
OUT
_AUX2
INPUT
_ENABLE
IN
_AUX1
INPUT
_EVENT_ENABLE
0 PCI_INTA# X PCI Interrupt X X
1 MIC_AC#/DC PCSPK PCSPK X Controls the AC/DC input on the microphone X
2 GPIO2 IRQ15 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 DCONMODE> X DCON status pin (2 of 2) X
7 DCONIRQ# PCI_INTB# X DCON Interrupt PIN X X
8 UART1_TX X UART Transmit X X
9 UART1_RX X UART Receive X X
PIN B2 Usage B1 A In Out Notes OUTPUT
_ENABLE
OUT
_AUX1
OUT
_AUX2
INPUT
_ENABLE
IN
_AUX1
INPUT
_EVENT_ENABLE
10 THERM_ALARM N/C X Thermal Alarm input X X
11 DCONLOAD P/U X Output indicator for DCON X
12 DCONBLNK X DCON Signal X
13 SMI# X SMI# pin to the GX X
14 SMB_CLK X X SMBus clock X X X X
15 SMB_DATA X X SMBus data X 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
PIN B2 Usage B1 A In Out Notes OUTPUT
_ENABLE
OUT
_AUX1
OUT
_AUX2
INPUT
_ENABLE
IN
_AUX1
INPUT
_EVENT_ENABLE
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 Controls MAIN_ON (which controls VCORE_CPU) X X
25 SWI# X Unknown - line comes from GPIO2 on the EC
26 PWR_BUT_in N/C X Lid event X X
27 SCI# X SCI from the EC for power and battery events X X
28 PWR_BUT# X Power button input X X
PIN B2 Usage B1 A In Out Notes OUTPUT
_ENABLE
OUT
_AUX1
OUT
_AUX2
INPUT
_ENABLE
IN
_AUX1
INPUT
_EVENT_ENABLE

Changes

Jan 15, 2007 (B2)

  • GPIO1 changes from AC_BEEP to MIC_AC#/DC output
  • GPIO10 changes from unused to THRM_ALARM input
  • GPIO26 changes from unused to PWR_BUT_in input
Personal tools
  • Log in
  • Login with OpenID
About OLPC
About the laptop
About the tablet
Projects
OLPC wiki
Toolbox