Kenwood NEXEDGE NXR-901, Service Manual

Page: 34 / 198

NXR-901
34
Pin No. Name I/O Function
CN407 (To X42-328 CN2: OCXO Optional unit)
1 OCXO I
OCXO (Optional unit) reference signal
input (coaxial)
CN408
1 REF_IN (10MHz) I External reference signal input (coaxial)
CN801 (To X45-387 C/4 CN12)
1 E - Ground
2 B I Power supply (Vcc)
3 B I Power supply (Vcc)
CN802 (To X45-387 A/4 CN1)
1 TX OUT O TX driver output signal (coaxial)
CN803 (To X42-328 CN1: OCXO Optional unit)
1 33MPU O Switched 3.3V power supply
2 GND - Ground
3 OX_SDA I/O OCXO EEPROM serial data
4 OX_SCL O OCXO EEPROM serial clock
5 OCXO_VR_EN O
Enable output for OCXO IC3 (potenti-
ometer)
6 OCXO_ON O OCXO power on signal
7 OX_SCLK2 O
Serial clock output for OCXO IC3 (po-
tentiometer)
8 OCXO_CURR I OCXO current detection signal
9 OX_SDI2 I
Serial data input for OCXO IC3 (poten-
tiometer)
10 OCXO_EXIST I OCXO detection signal
11 OX_SDO2 O
Serial data output for OCXO IC3 (po-
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 Modulation signal input
5 GND - Ground
6 SDO1 I
Serial data input for IC114(IC5), IC204,
IC703, IC705
7 SCLK0 I
Serial clock input for IC711(IC201,
IC207, IC701)
8 SCLK1 I
Serial clock input for IC2(IC5), IC204,
IC703, IC705
9 SDO0 I
Serial data input for IC711(IC201,
IC207, IC701)
10 SDI1 O Serial data output for IC703
11 SR_EN I Enable input for IC701
12 8AD_EN I Enable input for IC703
13 SR_OE I Enable input for IC701
14 2DA_CE I Chip enable input for IC705
Pin No. Name I/O Function
15 3DA_EN I Enable input for IC201
16 2DA_EN I Enable input for IC705
17 LDT O RF PLL lock detect output
18 132_CE I Chip enable input for IC204
19 440_CE I No connection
20 132_EN I Load enable input for IC204
21 440_EN I Load enable input for IC1(IC5)
22 VR_EN I Load enable input for IC207
23 VER O Hardware version control signal output
24 ANT_SW I TX antenna switch input
25 TEMP_PRT O Temperature 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
35 GND - Ground
36 GND - Ground
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
TERMINAL FUNCTION