Semiconductor Data - Kenwood TH-D72A Service Manual

TH-D72A/D72E
Main MCU: 5F3651TDFC
(TX-RX (Control) unit (A/3) IC737)
Pin No. Port Name I/O
1 VREF
2 AVCC
3 PKD96M
4 BSFT2
5 TNC_CAR
6 TONE
7 DTMF
8 SKY_SW
9 BSFT1
10 CNT_CLK
11 CNT_DT
12 DAC_EN
13 BYTE
14 CNVSS
15 PKTBND
16 VTX
17 /RST
18 XOUT
19 VSS
20 XIN
21 VCC
22 DAC_RST
23 PKS_IN
24 DC_DET
25 INT
26 RTS_TNC
27 RXD_TNC
28 CTS_TNC
29 TXD_TNC
30 TAB_S
31 LCDCNT
32 LDA
33 BEEP
34 RXD_COM
35 TXD_COM
36 TXD1
12

SEMICONDUCTOR DATA

Function
- Reference voltage
- VCC (3.3V Analog)
O PKD (9600bps) data mute L: ON
Beat shift for TNC MCU clock
O
H: ON
RX carrier signal input (for TNC)
O
L: ON
O Tone output
O DTMF tone output
COM port signal select
O
L: TNC, H: Main MCU
Beat shift for main MCU clock
O
H: ON
O Clock for electrical volume IC
O Data for electrical volume IC
Enable for electrical volume IC
O
L: ON
- Not used (GND)
I Not used
TNC input band select
O
L: Band A, H: Band B
O TX power supply control
I Reset
O System clock output (11.0592MHz)
- GND
I System clock input (11.0592MHz)
- VCC (3.3V)
O Reset for electrical volume IC
I PKS for TNC MCU H: TX
I DC input detection L: ON
I INT
O RTS for TNC MCU
I RXD for TNC MCU
I CTS for TNC MCU
O TXD for TNC MCU
Power supply control for RX
O
signaling AMP L: ON
LCD contrast adjustment output
O
L: ON
Lock detection input from PLL (IC431)
I
H: ON
O Beep output
I RXD for COM port
O TXD for COM port
O Not used
Pin No. Port Name I/O
37 VCC I VCC (3.3V)
38 RXD1 I Not used
39 VSS - GND
Power supply control for TNC
40 33TNC_S O
L: ON
41 SAVE2 O RX audio fi lter switch H: ON
42 TXD_S O TXD for SUB MCU
43 RXD_S I RXD for SUB MCU
44 RST_S O Reset for SUB MCU L: ON
Lock detection input from PLL (IC513)
45 LDB I
H: ON
46 KEY_O1 O Key matrix
47 KEY_O0 O Key matrix
48 KEY_IT I Key matrix
49 KEY_I4 I Key matrix
50 MICB_S O Power supply control for VOX AMP
51 RTC_SDA I/O Data for RTC
52 RTC_SCL O Clock for RTC
53 INTRTC I INT for RTC L: ON
54 KEY_I3 I Key matrix
55 KEY_I2 I Key matrix
56 KEY_I1 I Key matrix
57 KEY_I0 I Key matrix
58 32K_SW O Clock output control for RTC H: ON
59 KEY_O4 O Key matrix
60 KEY_O3 O Key matrix
61 KEY_O2 O Key matrix
62 LAMP O Back light control H: ON
Power supply control for 33C and
63 C_S O
47C H: ON
64 GP_ON O Always Low
65 TXD_IGPS O TXD for GPS module
66 RXD_IGPS I RXD for GPS module
67 GP_PS O Power save control for GPS module
Power supply control for GPS
68 VGPS O
module L: ON
69 /LCD_RST O Reset for LCD
70 /LCD_CS O Not used
71 /LCD_WR O W/R for LCD
72 A[0] O Data for LCD
73 D[7] O Data for LCD
74 D[6] O Data for LCD
75 D[5] O Data for LCD
76 D[4] O Data for LCD
77 D[3] O Data for LCD
Function