Table of Contents
Advertisement
Table 1- 11
GPIO Port Definition Map
GPIO
P2.4 (KB5_MDMIDB0)
P2.6 (KB5_MDMIDB1)
P2.5 (KB5_PSWD)
P2.7 (KB5_OEM)
P3.0 (SM5_TXD)
P3.1 (SM5_RXD)
P3.2 (KB5_KBDCLK)
87C51 (KBC) GPIO Pin Assignment
P3.3 (KB5_PTRCLK)
P3.4 (KB5_KBDDAT)
P3.5 (KB5_PTRDAT)
P3.6 (KB5_TOUCHWR#)
P3.7 (KB5_TOUCHRD#)
PCOBF (IS5_IRQ1)
AIN0 (KB5_PANID0)
AIN1 (KB5_PANID1)
AIN2 (KB5_PANID2)
AIN3 (KB5_PANID3)
PCDB0~PCDB7 (ISS_SDx)
A0 (IS5_SA2)
A1 (IS5_SA1)
CSL# (VS5_ROMKBCS#)
RDL# (IS5_IOR#)
WAL# (IS5_IOW#)
KSI[0:7] (KB5_KSl[0:7])
KSO[0:15] (KB5_KSO[0:15])
RST(SM5_KBCRST)
EAL# (KB5_KBCXRAM#)
80C51 (KBC) GPIO Pin Assignment (continued)
LOADREN
ADB[0:7] (KB5_ADB[0:7])
87C552(SMC) GPIO Pin Assignment
I/O
Description
0: CD-ROM installed
I
Memory ID0 and Memory ID1 for SIMM 2.
ID0
ID1
0
0
0
1
1
0
1
1
I
1: Enable password
I
1: Enable Acer logo shown on screen while BIOS POST.
I
UART serial input from SMC.
O
UART serial output to SMC.
I/O
External keyboard clock
I/O
External PS/2 clock
I/O
External keyboard data
I/O
External PS/2 data
O
Touchpad write
O
Touchpad read
O
IRQ1
I
Panel ID 0, 1, 2 and 3
ID3
ID2
0
0
0
0
I
ISA data bus
I
IO address select: 60h, 64h(for keyboard input buffer)
I
IO address select: 60h, 64h(for keyboard input buffer)
I
Keyboard chip select output
I
I/O read
I
I/O write
I
KB input scan line
O
KB output scan line
Hold "High"
Hold "High" for internal RAM access
Hold 'Low"
O
External address bus
Memory speed
50nS
40nS
70nS
60nS
ID1
ID0
TYPE
0
0
TFT
0
1
DSTN
Advertisement
Table of Contents
