Cpu Pins - HYT TC-446 Service Manual

CPU Pins

PIN No. PIN NAME
1 TI
2 BUSY
3 BATT
4 TIBI
5 NC
6 SAVE
7 TXLow
8 NC
9 DAT
10 CLK
11 LE
12 BEEP
13 SCL
14 SDA
15 MUTE
16 MS1
17 GREEN
18 RED
19 TXD
20 RXD
21 PTTK
22 MS2
23 RXC
24 NC
25 RESET
26 SELF
27 TXC
28 X
IN
29 X
OUT
30 Vss
31 R/T
32 UL
33 IF-SELECT
34 MONIK
ENC0
35
ENC1
36
ENC2
37
I/O
I CTCSS/CDCSS input
I Input busy signal
I Detect battery voltage
I CTCSS/CDCSS exterior circuit central point input
O Power saving control
O Transmitter power control
O data output
O clock output
O PLL IC enable
O Beep output
2
O E PROM clock cable
2
I/O E PROM data cable
O MIC mute control
I Model set
O Green light control
O Red light control
O RS-232C output
I RS-233C input
I PTT key input
I Standard model select
O Receiver power control
I Reset input
I Self-program
O Transmitter power control
I Oscillator input
O Oscillator output
I Grounding
O TX/RX control
I PLL unlock detector
I IF select
I MONI key input
I Channel selector knob encode input
I
I
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TC- 446 Service Manual
DESCRIPTION
H: OFF L: ON
H: Low power L: High power
H: Mic mute L: Mic enable
H: light
H: light
H: Non-standard L: Standard
L: power on
L: on
H:on
H：RX L： TX
H: Lock L: unlock
H: 21.4MHz L: 45.05MHz