
GPIO MUX
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27
AD13 gpio[16]
2
U 2 I/O 00 Reserved output
01 1284 nFault (peripheral-driven, duplicate)
3
02 Timer 11 (duplicate) or USB OVR
03 GPIO 16
AF12 gpio[17]
1,2
U 2 I/O 00 USB power relay
01 Reserved
02 Reserved
03 GPIO 17
AE12 gpio[18] U 4 I/O 00 Ethernet CAM reject
01 LCD power enable
02 Ext IRQ 3 (duplicate)
03 GPIO 18
AD12 gpio[19]
1
U 4 I/O 00 Ethernet CAM req
01 LCD line-horz sync
02 DMA ch 2 read enable (duplicate)
03 GPIO 19
AC12 gpio[20]
1
U 8 I/O 00 Ser port C DTR
01 LCD clock
02 Reserved
03 GPIO 20
AF11 gpio[21] U 4 I/O 00 Ser port C DSR
01 LCD frame pulse-vert
02 Reserved
03 GPIO 21
AE11 gpio[22] U 4 I/O 00 Ser port C RI / SPI port C clk
01 LCD AC bias-data enable
02 Reserved
03 GPIO 22
AD11 gpio[23] U 4 I/O 00 Ser port C DCD / SPI port C enable
01 LCD line end
02 Timer 14 (duplicate)
03 GPIO 23
AF10 gpio[24]
1
U 4 I/O 00 Ser port D DTR
01 LCD data bit 0
02 Reserved
03 GPIO 24
AE10 gpio[25] U 4 I/O 00 Ser port D DSR
01 LCD data bit 1
02 Timer 15 (duplicate)
03 GPIO 25
Pin # Signal name
U/D
OD
(mA)
I/O Descriptions (4 options: 00, 01, 02, 03)
Table 12: GPIO MUX pinout
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