Kenwood NX-3720, Service Manual

Page: 28 / 210

1-28 (No.RA054<Rev.001>)
6 FNC1
COM1_TXD I/O Yes Digital Programmable I/O VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH(Io=-1.5mA) 4.0 - 5.2 V
VOL(Io=1.5mA) - - 1.1 V
TXD
(RS-232C) O Digital RS-232C Serial port
(TXD) Voltage Swing ±5 ±5.2 V
Baud Rate - 300k bps
7 FNC2
COM1_RXD I/O Yes Digital Programmable I/O VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH(Io=-1.5mA) 4.0 - 5.2 V
VOL(Io=1.5mA) - - 1.1 V
RXD
(RS-232C) I Digital RS-232C Serial port
(RXD) Input Voltage Range -30.0 - 30.00 V
Threshold Low 0.51 1.326 - V
Threshold High - 1.632 2.448 V
Baud Rate - - 300k bps
CL - 100 - pF
8 FNC3 I/O Yes Digital Programmable I/O VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH(Io=-1.5mA) 4.0 - 5.2 V
VOL(Io=1.5mA) - - 1.1 V
RTS(RS232C) O Digital RS-232C Serial port (RTS) Voltage Swing ±5 ±5.2 - V
9 FNC4 I/O Yes Digital Programmable I/O VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH(Io=-1.5mA) 4.0 - 5.2 V
VOL(Io=1.5mA) - - 1.1 V
CTS
(RS232C) I Digital RS-232C Serial port
(CTS) Input Voltage Range -30.0 30.00 V
Threshold Low 0.5 1.3 V
Threshold High 1.75 2.6 V
10 FNC5 I/O No Digital Programmable I/O VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH(Io=-1.5mA) 4.0 - 5.2 V
VOL(Io=1.5mA) - - 1.1 V
11 FNC6 I/O No Digital Programmable I/O VIH 4.0 - 5.2 V
VIL -0.5 - 1.0 V
VOH(Io=-1.5mA) 4.0 - 5.2 V
VOL(Io=1.5mA) - - 1.1 V
12 50AC O No Power 5V DC Power supply Output Voltage 4.5 5 5.25 V
Output Current - - 100.0 mA
13 HR1 I Yes Analog Horn alert signal input Input Voltage 5 - 16 V
Input Current - - 2.0 A
COM2_TXD O Digital TXD VOH(Io=-1.5mA) 4.0 - 5.2 V
VOL(Io=1.5mA) -0.5 - 1.0 V
Pin
No.
Pin Name I/O Modification
Signal
Type
Description
Rating and Condition
Parameter Min Typ Max Unit