VAR-320SBC Reference Guide
Copyright © 2008 Variscite
4.12. Power
*See also
Chapter 5: Power supply and management
Power signals:
Signal
Pin number
Type
Description
PWR_EN P1-52 O
Active-high output from the PXA320 processor (input
to the PMIC), which enables the low-voltage core and
internal SRAM power supplies.
SYS_EN P1-54 O
Active-high output from the PXA320 processor which
enables the system (high-voltage) power supplies
RESET_IN_N P2-20
I
Master reset input (active low) to force complete
system reset
RESET_OUT_N
P2-124
I
Reset out line from PXA320 to peripheral devices
nONKEY P2-22 I
On
switch
activates the LP3972 PMIC.
EXT_WAKEUP1 P2-40
I
Wake-up
signal from Deep-Sleep
VDD_DDR_EXT
P1-34,36
I
DDR 1.8V supply for Deep-sleep
BACKUP
BATTERY
P2-46,48
I
Backup battery charger output
V_BATT
P1:
7,19,31,43,55,6
7,79,91,103,11
5,127,139.
P2:
7,19,31,43,55,6
7,79,91,103,11
5,127.
I
VAR-320SBC single DC-IN supply voltage.
Voltage range: 3.3v – 4.8v
GND
P1:
8,14,26,38,50,6
2,74,86,98,110,
122,134
P2:
2,14,26,38,50,6
2,74,86,110,12
2,134
I
27