Cpu Pins - HYT TC-610P Service Manual

CPU Pins

1. TC-610P (HDC1200 Ver.) CPU Pins
Pin No. Port
1 AVcc
2 AVR
3 PE3/INT13
4 PE2/INT12
5 PE1/INT11
6 PE0/INT10
7 P83
8 P82
9 P81
10 P80
11 P71/TI0
12 P70/TO0
13 MOD
14 X0
15 X1
16 Vss
17 Vcc
18 PG0
Pin Name
Vcc
Vcc
PTT
SK1
EXT-PTT
SK2
ENC3
ENC2
ENC1
ENC0
T/R
Reserved
Download
OSC0
OSC1
GND
VCC（5V）
C (this pin is not for I/O
use)
I/O
Power supply pin for A/D; connected to
power supply.
A/D reference input pin; connected to
power supply.
I PTT key (connected with external pull-up
resistor) (valid at low level).
I SK1 pin (connected with external pull-up
resistor) (valid at low level)
I Earpiece PTT input pin (connected with
pull-down resistor) (valid at high level)
I SK2 pin (connected with external pull-up
resistor) (valid at low level)
I
I Channel
(connected with pull-up resistor)
I
I
O Tx/Rx switch pin H (R) / L (T)
I An operating mode designation pin; when
downloading, this pin is connected with
VCC and external 47K resistor for ground
Vss; in other situations, it is connected
only with external 47K resistor for ground
Vss.
For 7.3728MHz main crystal oscillator
Power
downloading, this pin is connected to
Ground.
5V power supply pin for MCU; when
downloading, this pin is connected with
VCC.
5V MCU; this pin is not for I/O use, and it
must be connected with capacitor for
ground Vss.
21
TC-610P Service Manual
Function
Selector Knob input
supply (Ground) pin;
pin
when