Kenwood TKR-D710, Service Manual

Page: 68 / 127

TKR-D710
68
CONTROL I/O 25 pin D-sub Connector
Pin
No
Pin Name I/O
Signal
Type
Signal Summary Specifi cation Min Typ Max Unit Remarks
1 NC (RSSI) - - - - - - - -
2 RXD 2 I Digital
Asynchronous
Receive Data
- –15 - +15 V
conform to
RS-232C
3 TXD 2 O Digital
Asynchronous
Send Data
- ±5.0 ±9.0 V
RL=3k

conform to
RS-232C
4 AI1 I Digital
Programmable
Function Input 1
/CMOS
VIH 0.8Vcc Vcc V
Vcc=5V±2%
VIL VSS 0.2Vcc V
Input impedance 47k Ohm 47k ohm PU to Vcc
5 AI2 I Digital
Programmable
Function Input 2
/CMOS
VIH 0.8Vcc Vcc V
Vcc=5V±2%
VIL VSS 0.2Vcc V
Input impedance 47k Ohm 47k ohm PU to Vcc
6 AI3 I Digital
Programmable
Function Input 3
/CMOS
VIH 0.8Vcc Vcc V
Vcc=5V±2%
VIL VSS 0.2Vcc V
Input impedance 47k Ohm 47k ohm PU to Vcc
7 DG - GND Digital GND - - - - -
8 TD - - Non-use - - - - -
9 TA - - Non-use - - - - -
10 RD - - Non-use - - - - -
11 RA - - Non-use - - - - -
12 RXG - GND RX Signal GND - - - - -
13 SPM I Digital
Speaker Mute
/CMOS
VIH 0.7Vcc1 - 5.5 V
Vcc1=3.3V±2%
VIL - - 0.3Vcc1 V
Input impedance 47k Ohm
47k ohm PU to Vcc
14 BER_CLK O Digital
for Bit Error Rate
Clock
VOH (IO=–20µA) 4.4 4.5 V
VOL (IO=20µA) 0 0.1 V
15 EMON - - Non-use - - - - -
16 EPTT - - Non-use - - - - -
17 SC O Digital
Squelch Control
/CMOS
VOH(IO=-0.5mA) 4.4 4.5 4.6 V
47k ohm PU to Vcc
VOL(IO=0.5mA) 1.1 V
18 BER_DAT O Digital
for Bit Error Rate
Data
VOH (IO=–20µA) 4.4 4.5 V
VOL (IO=20µA) 0 0.1 V
TERMINAL FUNCTION