TDP-643R PLUS BAR CODE PRINTER
SERVICE MANUAL
- 12 -
3.2 MCU Pin Description
Port
I/O Initial High
Low
Function
Instruction
PA0
I
Pull Up
RXD0
RXD for RS232
PA1
O
TXD0
TXD for RS232
PA2
I
Pull Up
PA2
RTS for RS232
PA3
O
PA3
CTS for RS232
PA4
O
TXD1
DI for TPH
PA5
O
SCK1
CLK for TPH
PA6
O
Pull Up
Active /CS2
/CS2
PA7
O
Pull Up
Active /CS3
/CS3
PA8
I
Active IRQ2
Power down
PA9
I
Pull Up
Active IRQ3
USB_INT
PA10
O
Pull Up
Active /CS0
/CS0
PA11
O
Pull Up
Active /CS1
/CS1
PA12
O
/WRL
/WRL
PA13
O
/WRH
No use
PA14
O
/RD
/RD
PA15
O
Pull Up
Enable PA15
/LAT for TPH
PB0
O
A16
A16
PB1
O
A17
A17
PB2
O
/RAS
/RAS
PB3
O
/CASL
/CASL
PB4
O
/CASH
/CASH
PB5
O
RDWR
RDWR
PB6
O
A18
A18
PB7
O
A19
A19
PB8
O
A20
A20
PB9
O
A21
A21
PC0~PC1
5
O
A0~A15
A0~A15
PD0~PD1
5
I/O
D0~D15
D0~D15
PE0
O
PWM Enable
TIOC0A
GAP LEVEL
PE1
I
Pull Up
PE1
KEY3
PE2
I
Pull Up Enable
PE2
CASE OPEN
PE3
I
Pull Up
Enable PE3
/STTOBE for Centronic port
PE4
O
PWM
Enable TIOC1A
DCM for DC motor enable
PE5
O
Pull Up Enable
PE5
STB1 for TPH
PE6
I
Pull Up
Enable PE6
DC SENS for DC sensor
PE7
O
Pull Up Enable
PE7
STB2 for TPH
PE8
I
Pull Up
PE8
KEY2
PE9
I
Pull Up
PE9
KEY1
PE10
O
Pull Up Enable
PE10
STB3 for TPH
PE11
I
Pull Up
Enable PE11
CT SENS for cutter sensor
PE12
I/O Pull Up
PE12
SUSPEND for USB
