GPIO list for e740


GPIO AF: 00000002 aaaaaaaa aaa5aaaa 68908018 a5000010 81000004

GPAFs  : 0001ffff ffffecc6 f004e002
GPDR   : 0001ffff fcffabeb c999908c

0  1  2  3  4  5  6  7  8  9  10 11 12 13 14 15 16 17 18 19
I     o  O  i  o  I  o  I  I  I  I     I  i     o  I     o
   a                                a        A        a

20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
o  I  I  o  O  i  I  i              O        o  i  o  o 
                        a  a  A  A     A  a              A

40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59
o  O        I
      a  A     A  A  a  A  A  A  A  A  A  A  A  aI aI A  A


60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79

A  A  A  A  A  A  A  A  A  A  A  A  A  A  A  A  A  A  A  A

80

A

I known input
i unknown input
O known output
o unknown output
A = alt 10
a = alt 01

Inputs / irqs
0:  Power button           active low
4:  Routed to SD/USB HC (ohci) controller.   (almost certainly #HINT)
6:  WiFi PCMCIA IRQ
8:  CF card inserted       active low
9:  SD card inserted       active low
10: Battery compartment locked  active high
11: CF slot PCMCIA IRQ
13: USB client connected     active high
14: Keypad IRQ??
17: charging               active high
21: touchscreen interrupt  active high
22: mains                  active high  (also connected status LED)
25: wolfsen pin 47 (BUSY pin)
26: battery type switch    active low
36: imageon IRQ?   (J4 on Imageon)
44: Wifi switch              active low

outputs:
2:  pin 7 on cradle connector
3:  USB disconnect when high
5:  A pin on row 14 of SD/USB chip
7:  SD/USB controller         (probably #PCLR)
16: Mic enable (wolfsen AVdd2, pin 38)
19: A pin on the SD/USB chip  (probably #SUSPEND)
20: CF slot power (voltage?)
23: Goes (apparently) to the orange LED on the wifi 2-colour LED, via logic.
24: WiFi PCMCIA RST (I suspect)
27: CF PCMCIA RST (I suspect)
32: Imageon Reset? (pin J5 on Imageon)
35: Apparently unused on wifi or bluetooth models.
37: exp port, pin 2 (likely) FFDSR
38: IrDA power (probably)
40: unknown (to 10 pin chip near wolfsen - pin 3 via some 3 pin device) (mic enable?)
41: Controls power to the audio subsystem

AF usage
1:  Reset
12: 32kHz clock
15: CS 1
18: External bus ready
28,29,30,31: AC97
33: CS 5
34, 39: FFUART Rx, Tx
42, 43, 45: BTUART Rx, Tx, RTS
46, 47: STUART Rx, Tx
48,49,50,51,52,53: PCCard space
54: Card space socket sel.
55,56,57: Card space
58-77: LCD pins abused to drive VGA out.
78: CS 2
79: CS 3 Imageon
80: CS 4 Toshiba ASIC

note: GPDR1 *must not* clear bits  0x00020001 or the machine will hang or reset.
note: GPDR2 *must not* clear bit   0x00008000 or the machine will hang.