Kenwood NXR-700 Service Manual page 35

Pin No. Name I/O
Serial data output for OCXO IC3 (po-
11 OX_SDO2 O
tentiometer)
12 GND - Ground
13 REF_SW2 O OCXO reference signal output switch
CN804 (To X53-413 CN56)
1 GND - Ground
2 GND - Ground
3 WP I EEPROM write protect signal input
4 MOD I Moduration signal input
5 GND - Ground
Serial data input for IC101, IC202,
6 SDO1 I
IC303, IC802, IC803
7 SCLK0 I Serial clock input for IC703
Serial clock input for IC101, IC202,
8 SCLK1 I
IC303, IC802, IC803
9 SDO0 I Serial data input for IC701, IC703
10 SDI1 O Serial data output for IC803
11 SR_EN I Enable input for IC701, IC703
12 8AD_EN I Enable input for IC803
13 SR_OE I Enable input for IC703
14 2DA_CE I Chip enable input for IC802
15 3DA_EN I Enable input for IC701
16 2DA_EN I Enable input for IC802
17 LDT O RF PLL lock detect output
18 132_CE I Chip enable input for IC303
19 440_CE I Chip enable input for IC101
20 132_EN I Load enable input for IC303
21 440_EN I Load enable input for IC101
22 VR_EN I Load enable input for IC304
Load enable input for IC202 / Hardware
23
DDS_EN/VER I/O
version control signal output
24 ANT_SW I TX antenna switch input
25 TEMP_PRT O Temp protection signal output
26 SCK I EEPROM Clock
27 D_GND - Ground
28 SDA I/O EEPROM Data
29 D_GND - Ground
30 CONT_5.0V I Switched 5V power supply
31 D_GND - Ground
32 CONT_5.0V I Switched 5V power supply
33 GND - Ground
34 PAG I POCSAG Switch
35 GND - Ground
36 GND - Ground
TERMINAL FUNCTION
Function Pin No. Name I/O
CN805 (To X53-414 CN400)
1 GND - Ground
2 GND - Ground
3 33MPU I Switched 3.3V power supply
4 OX_SCLK2 I Serial clock input for IC601, IC404
5 GND - Ground
6 OX_SDO2 I Serial data input for IC601, IC404
7 GND - Ground
8 PLL_19_CE I 100kohm load
9 GND - Ground
10 PLL_19_EN I Enable input for IC404
11 GND - Ground
12 REF_LDT O 19.2MHz PLL lock detect output
13 GND - Ground
14 VCXO_DA_EN I Enable input for IC601
15 GND - Ground
16 OCXO_EXIST O OCXO detection signal
17 GND - Ground
18 OCXO_CURR O OCXO current detection signal
19 GND - Ground
20 OCXO_ON I OCXO power on signal
21 GND - Ground
Enable input for OCXO IC3 (potentiom-
22 OCXO_VR_EN I
eter)
23 GND - Ground
Serial data output for OCXO IC3 (po-
24 OX_SDI2 O
tentiometer)
25 GND - Ground
26 REF_IN_OUT I Reference clock switched signal input
27 IMP_H_L I 100kohm load
28 REF_EXIST O Reference detector signal output
29 OX_SDA I/O OCXO EEPROM serial data
30 EXT_EXIST O External reference detector signal output
31 OX_SCL I OCXO EEPROM serial clock
32 REF_SW I Reference signal output switch
33 WP I EEPROM write protect signal input
34 REF_SW2 I OCXO reference signal output switch
35 GND - Ground
36 GND - Ground
CN806 (To X45-385 A/5 CN20)
1 GND - Ground
2 GND - Ground
3 WP O EEPROM write potect signal output
NXR-700
Function
35