Kenwood TH-D72A, Service Manual

Page: 14 / 97

TH-D72A/D72E
14
SEMICONDUCTOR DATA
Pin No. Port Name I/O Function
24 AVSS - GND
25 NC - Not used
26 BT_V I Battery voltage detection
27 CHGEND I Battery charging current detection
28 FTH I Thermal detect from charge
29 430TX_S O
UHF TX power supply control
H: ON
30 VHF_B O
VCO power supply control for band
B L: VHF, H; UHF
31 144TX_S O
VHF TX power supply control
H: ON
32 SHIFT_B O VCO shift switch for band B
33 PS_B O
PLL power supply control for IC513
H: ON
34 PS_A O
PLL power supply control for IC431
H: ON
35 TR_DATA O Data output for PLL
36 INTS I INT
37 B_S O
Power supply control for 33CB
L: ON
38 A_S O
Power supply control for 33CA
L: ON
39 TR_CLOCK O Clock output for PLL
40 RST I Reset
41 LE_A O LE output for PLL IC (IC431)
42 XT1 O Beat shift control H: ON
43 FLMDO - Not used
44 SCLK - System clock (11.0592MHz)
45 XOUT - System clock output (11.0592MHz)
46 REGC - Bypass condenser
47 VSS - GND
48 VDD - VDD 3.3V
TNC MCU: 5F364AMDFB
(TX-RX (Control) unit (A/3) IC727)
Pin No. Port Name I/O Function
1~3 NC - Not used
4 SIN I Data input
5 SCLKR I Clock input
6 BYTE I Data bus select
7 CNVSS I Not used
8 NC - Not used
9 STA O Data status
10 RESET I TNC reset
11 Xout - System clock output (15.9744MHz)
Pin No. Port Name I/O Function
12 Vss - GND
13 Xin - System clock input (15.9744MHz)
14 VCC1 - VCC1(3.3V)
15,16 NC - Not used
17 SCLKT I TX data clock input (for TNC ASIC)
18 SCLKR I RX data clock input (for TNC ASIC)
19 CON O TNC connect signal output
20 P80 I Pull down
21,22 NC - Not used
23 GPSLED O EXT GPS LED output H: Active
24 NC - Not used
25 CTS_TNC I CTS (for main MCU)
26 RTS_TNC O RTS (for main MCU)
27 TXD_TNC I TXD (for main MCU)
28 RXD_TNC O RXD (for main MCU)
29~32 P67~P64 I Not used
33 TXD_EGPS O EXT GPS TXD (COM port)
34 RXD_EGPS I EXT GPS RXD (COM port)
35,36 NC - Not used
37 CLKOUT O Clock output (15.9744MHz)
38 NC - Not used
39 P55 I Not used
40~43 NC - Not used
44 P50 I Not used
45 SQ I Squelch signal input L: Signal ON
46 TNC_CAR I
RX carrier signal input (for TNC ASIC)
L: Carrier ON
47 PLLLOCK I PLL lock signal input (for TNC ASIC)
48 FLAG I Flag signal input (for TNC ASIC)
49 TTX O
TX/RX select (for TNC ASIC)
H: TX, L: RX
50 S9600 O
9600/1200 bps select (for TNC ASIC)
H: 9600bps, L:1200bps
51 LOOP O Loop back test output (for TNC ASIC)
52 PLLCNT O
PLL lock speed control output
(for TNC ASIC)
53~59 NC - Not used
60 VCC2 - VCC2 (3.3V)
61 NC - Not used
62 VSS2 - GND
63,64 NC - Not used
65 TNC_WR I Not used
66 P24 I Pull up
67 P23 I Pull down
68 P22 I Pull up