Pioneer VSX-321-K-P Service Manual page 30

1
A • Pin Function
Name
OP_MODE
RSTb
X_IN
X_OUT
P0[2:0]
B
P11
P21
P3[5:4, 1:0]
P41
P50
P7[4,1:0]
P87
P90
VDD
VSS
C
D
E
F
30
1
2
In/Out Buffer Type
IN IXDXXP Chip operation mode.
0: Normal mode
1: ICP (In Circuit Flash Programming) mode
NOTE: The input crystal rate will be 24 MHz if this ICP mode is used.
IN BDUX8P External Reset (active low) with on-chip pull-up.
When this pin is asserted low, the chip is totally reset.
IN XTL24P Crystal input
OUT XTL24P Crystal output
IN/OUT BRXX12P GPIO port 0 with programmable Open Drain capability.
IN/OUT BRUX8P GPIO port 1 or Keyboard Interrupt inputs with internal 20 kΩ pull-up to VDD
IN/OUT BRXX8P GPIO port 2 with programmable Open Drain capability.
OD IN/OUT BRXX8P Open Drain I/O port 3. Shared with IIC.
IN/OUT BRXX8P GPIO port 4 or External Interrupt inputs
IN/OUT BRXX24P GPIO port 5 with programmable Open Drain capability. 20 mA drive
IN/OUT BRXX8P Open Drain I/O port 7. P7[1:0] shared with Serial Port. P7[4] share with CIR.
IN/OUT BRXX8P GPIO port 8 with programmable Open Drain capability. Share with PWM
IN/OUT BRXX8P GPIO port 9 with programmable Open Drain capability.
PWR — Digital VDD (3.3 V)
PWR — Digital Ground
2
3
Description
HTP-071
3
4
4