HYT TC-610P Service Manual page 26

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
19 PG2/X1A
20 PG1/X0A
21 /RST
22 P00/INT00
23 P01/INT01
24 P02/INT02
25 P03/INT03
26 P04/INT04
27 P05/INT05
28 P06/INT06
29 P07/INT07
30 P10/UI0
31 P11/UO0
ENC3
ENC2
ENC1
ENC0
T/R
Reserved
For download
OSC0
OSC1
GND
VCC（5V）
C (not for I/O use)
OSC32K
OSC32K
RESET
Reserved
Reserved
Reserved
Reserved
KB8825_PLL_EN
KB8825_PLL_DATA
KB8825_PLL_CLK
KB8825_LD
RXD
TXD
I
I Channel Selector Knob input pin
(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 supply (Ground) pin; when
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.
Secondary crystal oscillator pin
(reserved)
I Reset pin (When downloading, this pin is
c onnected to RSTX.)
O
O
O
O
O KB8825 PLL ENABLE
O KB8825 PLL DATA
O KB8825 PLL CLOCK
I KB8825 PLL unlock detect pin (H:
Lock; L: unlock) (connected with external
pull-up resistor)
I UART RX pin (When downloading, this
pin is connected to UI.)
O UART TX (When downloading, this pin is
connected to UO.)
24
TC-610P Service Manual