Kenwood NXR-901 Service Manual page 32

NXR-901
Pin No. Name I/O
35 GND -
36 PTT_TXD_SCM -
CN402 (To X53-413 CN2)
1 HI_VOL_DET I
2 GND -
3 50MPU_A_GND -
4 50MPU I
5 50MPU_A_GND -
6 DC50 I
7 DC50 I
8 DC50 I
9 DC50 I
10 33MPU_A_GND -
11 33MPU I
12 33MPU I
13 33MPU_A_GND -
14 50MPU_A I
15 33MPU_A I
16 33SH O 3.3V constant voltage
17 50MPU_CONT O 5V regurator control
18 NC -
19 E_PTT_SH I
20 SC_SH I
21 GND -
22 SRX0_ATX0 O
23 STX0_ARX0 I
24 GND -
25 RF_PTT I
26 TX_STATE I
27 QT_DQT I
28 RADIO_EER I
29 GND -
30 ADSP_CK_SFT O
31 TRUKING I
32 A16C_CK_SFT O "Frequency shift" signal to RF control MPU
33 BER_DAT O Serial data for measurement bit error rate
34 BER_CLK O Serial clock for measurement bit error rate
35 GND -
36 SYS_RST O
32
TERMINAL FUNCTION
Function
Ground
No connection
Voltage monitor
Ground
Ground
5V constant voltage
Ground
5V constant voltage
5V constant voltage
5V constant voltage
5V constant voltage
Ground
3.3V constant voltage
3.3V constant voltage
Ground
5V constant voltage
3.3V constant voltage
No connection
"External press-to-talk-switch" signal
to Main MPU
"Squelch control" signal to Main MPU
Ground
UART signal from RF control MPU to
Main MPU
UART signal from Main MPU to RF
control MPU
Ground
"Press-to-talk-switch" signal to Main MPU
"During the transmission" signal to
Main MPU
"Detect QT or DQT" signal to Main MPU
"Detect accident of RF block" signal to
Main MPU
Ground
"Frequency shift" signal to Analog
mode DSP
"Trunking mode" signal to Main MPU
Ground
System reset signal from modem
control MPU
Pin No. Name I/O
CN713 (To COM D-sub 9-pin connector)
1 CD - No connection
2 DSR I Data Set Ready
3 RD I Receive Data
4 RTS O Request to Send
5 SD O Send Data
6 CTS I Clear to Send
7 DTR O Data Terminal Ready
8 RI - No connection
9 GND - Ground
J701 (To CF card)
1 GND - GND
2 D03 CF I/O Data
3 D04 CF I/O Data
4 D05 CF I/O Data
5 D06 CF I/O Data
6 D07 CF I/O Data
7 CE1A CF O Card enable 1
8 A10 CF O Address
9 RD CF O Read enable
10 A09 CF O Address
11 A08 CF O Address
12 A07 CF O Address
13 33CF - 3.3V
14 A06 CF O Address
15 A05 CF O Address
16 A04 CF O Address
17 A03 CF O Address
18 A02 CF O Address
19 A01 CF O Address
20 A00 CF O Address
21 D00 CF I/O Data
22 D01 CF I/O Data
23 D02 CF I/O Data
24 NC - No connection
25 CD2 I Card detection 2
26 CD1 I Card detection 1
27 D11 CF I/O Data
28 D12 CF I/O Data
29 D13 CF I/O Data
30 D14 CF I/O Data
31 D15 CF I/O Data
32 CE2A CF O Card enable 2
33 NC - No connection
Function