Kenwood NXR-901 Service Manual page 29

Pin No. Name I/O
12 K2 I Key Scan
13 K1 I Key Scan
14 GND - Ground
15 STB1 O Shift register strobe
16 GND - Ground
17 SR_DATA O Shift register data
18 GND - Ground
19 SR_CLK O Shift register clock
20 GND - Ground
21 SR_OE O Shift register output enable
22 GND - Ground
23 PTT_TXD_SCM I MIC PTT
24 SCM_EN - No connection
25 HOOK_RXD_SCM I HOOK detect input
26 GND - Ground
27 OCXO_ST_G O OCXO Green LED switch
28 PWR_ST_R O POWER Red LED switch
29 OCXO_ST_R O OCXO Red LED switch
30 SB O Power supply output
31 VOLUME_IN I Volume control input for AF signal
32 33AUD O 3.3V constant voltage
33 33MPU O 3.3V constant voltage
34 MIC I MIC signal Input
35 GND - Ground
36 MIG - MIC ground
CN4 (To X45-387 C/4 CN11)
1 E - Earth
2 NC - No connection
3 SB I Power supply input
4 SB I Power supply input
CN56 (To X56-315 A/3 CN804)
1 GND - Ground
2 GND - Ground
3 PAG O Not used
4 GND - Ground
5 CONT_5.0V O 5V constant voltage
6 D_GND - Digital ground
7 CONT_5.0V O 5V constant voltage
8 D_GND - Ground
9 SDA I/O EEPROM data
10 D_GND - Ground
11 SCK O EEPROM clock
12 TEMP_PRT I Not used
13 ANT_SW O PA device's DC switch control
TERMINAL FUNCTION
Function Pin No. Name I/O
14 VER I Hardware version DC signal
15 VR_EN O Enable for electronic volume
16 440_EN O Enable for PLL
17 132_EN O Enable for PLL
18 440_CE O PLL chip select
19 132_CE O PLL chip select
20 LDT I PLL lock detection
21 2DA_EN O Enable for 2ch DAC
22 3DA_EN O Enable for 3ch DAC
23 2DA_CE O Chip select for 2ch DAC
24 SR_OE O Shift register output enable
25 8AD_EN O Enable for 8ch DAC
26 SR_EN O Shift register strobe
27 SDI1 I Analog data of 8ch ADC
28 SDO0 O Data for 3 line serial
29 SCLK1 O Clock 1 for 3 line serial
30 SCLK0 O Clock for 3 line serial
31 SDO1 O Data 1 for 3 line serial
32 GND - Ground
33 MOD O Modulating signal
34 WP O Write protection of EEPROM
35 GND - Ground
36 GND - Ground
CN57 (To X55-312 CN42)
1 GND - Ground
2 GND - Ground
3 WP O Write protection of EEPROM
4 D_GND - Digital ground
5 E2PROM_SDA I/O Data of EEPROM
6 CONT_5.0V - 5V constant voltage
7 E2PROM_SCL O Clock of EEPROM
8 D_GND - Digital ground
9 AD_CS O Enable for 8ch DAC
10 IF_BW_SW O IF fi lter bandwidth switch
11 AD_DAT_WRITE O Data 0 for 3 line serial I/F
12 NC (IF_NW_SW) - No connection
13 AD_CLK O Clock 0 for 3 line serial I/F
14 GND - Ground
15 AD_DAT_READ I Analog data of 8ch ADC
16 NC - No connection
17 CONT_5.0V - 5V constant voltage
18 PLL_LOCK_DET I PLL 1,2 lock detection
19 NC (AGC_RSSI) - No connection
20 PLL2_EN O PLL 2 enabling signal
NXR-901
Function
29