TK-3178
(
L
)
54
■
Solder Point Connection
Designation
Function
Condiition / Value
RXD
RXD
Load >100k
Ω
(Low) Vss~0.4V, (High) Vdd–0.8V~Vdd
TXD
TXD
Load >100k
Ω
(Low) Vss~0.4V, (High) Vdd–0.8V~Vdd
MDSW
Mandown
SW input
Load >100k
Ω
(Low) Vss~0.4V, (High) Vdd–0.8V~Vdd
A1
AUX1
Load >100k
Ω
(Low) Vss~0.4V, (High) Vdd–0.8V~Vdd
SB
Switched B
Output voltage / 7mA load
DC (Battery terminal)
±0.5V / 150mA max
G
GND
Vss
■
CN18 and CN901
CN18
CN901
Terminal
name
Terminal function
Pin No I/O Pin No. I/O
1
-
26
-
GND
GND
2
O
25
I
PC
Transmitter Power control voltage
3
O
24
I
DSW
Power discharge switch
4
O
23
I
APCSW
APC control switch
5
O
22
I
5T
5V Power supply for TX
6
O
21
I
5T
5V Power supply for TX
7
O
20
I
5C
5V Power supply for common
8
O
19
I
5C
5V Power supply for common
9
O
18
I
5R
5V Power supply for RX
10
O
17
I
NARROW
Narrow control
11
O
16
I
WIDE
Wide control
12
I
15
O
DETAF
RX audio signal line
13
I
14
O
RSSI
RSSI voltage
14
I
13
O
ASQL
SQL voltage
15
O
12
I
BPF
BPF tuning voltage control
16
I
11
O
THM
Thermo-protection
17
O
10
I
PLE
PLL enable
18
O
9
I
PDATA
PLL data
19
O
8
I
PCLK
PLL clock
20
I
7
O
UL
UNLOCK detect
21
O
6
I
5MS
5V Power supply for main
22
O
5
I
TCXO
TCXO control
23
O
4
I
MOD
Modulation signal line
24
O
3
I
TX
TX control
25
O
2
I
RX
RX control
26
-
1
-
GND
GND
TERMINAL FUNCTION
■
CN82
Pin No.
I/O
Terminal
name
Terminal function
1
O
V5
LCD Driving voltage output
2
O
V4
LCD Driving voltage output
3
O
V3
LCD Driving voltage output
4
O
V2
LCD Driving voltage output
5
O
V1
LCD Driving voltage output
6
O
VDD
Power supply
7
-
VSS
GND
8
O
VDD
Power supply
9
O
D7
Data bus
10
O
D6
Data bus
11
O
D5
Data bus
12
O
D4
Data bus
13
O
D3
Data bus
14
O
D2
Data bus
15
O
D1
Data bus
16
O
D0
Data bus
17
O
/WR
Write signal
18
O
A0
Display/Instruction data
19
O
/RES
Reset
20
O
/CS
Chip Select