Kenwood NXR-901 Service Manual page 33

Pin No. Name I/O
34 IO RD O I/O area read enable
35 IO WR O I/O area read enable
36 WE CF O Write enable
37 R/B/IREQ CF I Ready busy/Interruption demand
38 33CF - 3.3V
39 NC - No connection
40 NC - No connection
41 RESET CF O Reset
42 WAIT CF I Wait
43 NC I No connection
44 REG O Attribute area selection
45 NC - No connection
46 NC - No connection
47 D08 CF I/O Data
48 D09 CF I/O Data
49 D10 CF I/O Data
50 GND - GND
RX unit (X55-3120-11)
Pin No. Name I/O
CN5 (To RX ANT)
1 RX_SIGNAL I Receive signal input (Coaxial)
CN42 (To X53-413 CN57)
1 GND - Ground
2 GND - Ground
3 NC - No connection
4 RX_POWER_SAVE I No connection
5 DDS_EN I No connection
6 VCO_BAND_SW I No connection
7 PLL1_EN I Enable input for 1st Lo PLL (PLL1)
8 DA_EN I Enable input for DA
9 SIF_CLK I Clock input for PLL1/PLL2/DA
10 GND - Ground
11 SIF_DAT I Data input for PLL1/PLL2/DA
12 RX_AUDIO O RX audio output
13 PLL_PWR_SAVE I No connection
14 GND - Ground
15 NC - No connection
16 FM_RSSI O FM RSSI output
17 PLL2_EN I Enable input for 2nd Lo PLL (PLL2)
18 NC (AGC_RSSI) - No connection
19 PLL_LOCK_DET O PLL1/PLL2 lock detect output
20 CONT_5.0V I Switched 5V supply
21 NC - No connection
TERMINAL FUNCTION
Function
Function
Pin No. Name I/O
22 AD_DAT_READ O AD logic data output
23 GND - Ground
24 AD_CLK I Clock input for AD
25 NC (IF_NW_SW) - No connection
26 AD_DAT_WRITE I Serial data input for AD
27 IF_BW_SW I IF bandwidth switch input
28 AD_CS I Enable input for AD
29 D_GND - Digital ground
E2PROM_
30
I Clock input for EEPROM
SCL
31 CONT_5.0V I Switched 5V supply
32 E2PROM_SDA I/O Data input for EEPROM
33 D_GND - Digital ground
34 WP I Write protection input for E2PROM
35 GND - Ground
36 GND - Ground
CN43 (To X53-414 CN300)
1 RX_IF_VN O RX NXDN detection output
CN44 (To X45-387 C/4 CN15)
1 E - Ground
2 B I Power supply input
3 B I Power supply input
CN45 (To X56-315 A/3 CN406)
1 REF1 I Reference signal input
CN46
1 - I Use for RX MCF tuning
2 GND - Ground
CN47
1 - O Use for RX MCF tuning
2 - - Ground
CN68
1
LEVEL MONITOR O Use for RX AGC level monitor (Coaxial)
TX unit (X56-3150-11) (A/3)
Pin No. Name I/O
CN403
REF_OUT
1 O Reference signal distribution (coaxial)
(10MHz)
CN405 (To X53-414 CN302)
REF2
1 O DSP reference signal output (coaxial)
(20.0MHz)
CN406 (To X55-312 CN45)
REF1
1 O Rx reference signal output (coaxial)
(20.0MHz)
NXR-901
Function
Function
33