
VIPER Technical Manual
Detailed hardware description
© 2007 Eurotech Ltd Issue E
23
GPIO
No AF Signal name
Dir
Active
Sleep Function
See section…
14 0 FLASH_
STATUS
Input NA
Input Bootloader
FLASH
Status,
Ready / nBusy
(page
(page
15 2 CS1
Output Low
Hi-Z Chip Select 1
(page
16 2 PWM0
Output See
inverter
datasheet
0 Backlight
Brightness
On/Off or variable if
PWM
LCD backlight brightness
control
17 2 PWM1
Output NA
0
STN Bias
(page
313H
18 1 ARDY
Input Low
Input
10/100 Ethernet PHY
Ready
-
19 0 PSU_nCS_LD Output Low
0
Microprocessor
Core
Voltage DAC Chip
Select
20 0 OUT0
21 0 OUT1
22 0 OUT2
23 0 OUT3
24 0 OUT4
25 0 OUT5
26 0 OUT6
27 0 OUT7
Output
User
Config
0
User Config
(page
28 1
AC97_BITCLK Input
Input BITCLK
29 1
AC97_IN
Input NA
Input SDATA_IN0
30 2 AC97_OUT
Output NA
0
SDATA_OUT
31 2 AC97_SYNC Output
0
SYNC
-
32 0 CF_DETECT Input
Input CF Detection
(page
) and
33 2 CPLDCS
Output Low
Hi-Z Chip Select 5
(page
continued
…
VL
VL
VL
VL