LG LH-T3520X Service Manual page 46

Pin Name I/O
Port 7 I/O • 4-bit I/O port
• I/O specifiable in 1-bit units
P70 to P73
• Pull-up resistor can be turned on and off in 1-bit units
• Shared pins
P70 : INT0 input/HOLD reset input/timer 0L capture input/watchdog timer output
P71 : INT1 input/HOLD reset input/timer 0H capture input
P72 : INT2 input/HOLD reset input/timer 0 event input/timer 0L capture input/
P73 : INT3 input (with noise filter)/timer 0 event input/timer 0H capture input
AD converter input port: AN8 (P70), AN9 (P71)
• Interrupt acknowledge type
Port 8 I/O • 7-bit I/O port
• I/O specifiable in 1-bit units
P80 to P86
• Shared pins
AD converter input port : AN0 (P80) to AN6 (P86)
PWM2 I/O • PWM2 and PWM3 output ports
PWM3 • General-purpose I/O available
Port 3 I/O • 8-bit I/O port
• I/O specifiable in 1-bit units
P30 to P37
• Pull-up resistor can be turned on and off in 1-bit units
• Pin functions
P32: UART1 transmit
P33: UART1 receive
P34: UART2 transmit
P35: UART2 receive
Port C I/O • 8-bit I/O port
• I/O specifiable in 1-bit units
PC0 to PC7
• Pull-up resistor can be turned on and off in 1-bit units
• Pin functions
RES
Input Reset pin
XT1 Input • 32.768kHz crystal oscillator input pin
• Shared pins
General-purpose input port
AD converter input port : AN10
Must be connected to V DD 1 if not to be used.
XT2 I/O • 32.768kHz crystal oscillator output pin
• Shared pins
General-purpose I/O port
AD converter input port : AN11
Must be set for oscillation and kept open if not to be used.
CF1 Input Ceramic resonator input pin
CF2 Output Ceramic resonator output pin
high speed clock counter input
Rising Falling
INT0 enable enable
INT1 enable enable
INT2 enable enable
INT3 enable enable
PC5 to PC7: On-chip Debugger
2-37
Description
Rising/
H level
Falling
disable enable
disable enable
enable disable
enable disable
Option
No
L level
enable
enable
disable
disable
No
No
Yes
Yes
No
No
No
No
No