4
CIRCUIT DESCRIPTION
X-VH7
Pin Name I/O Connect Description
1 S.BUSY I/O OPEN Serial communication BUSY signal H: BUSY L: READY
2~5 — I OPEN No used
6~9 KS0,1,3,2 O PU KEY SCAN 0,1,3,2
14~16 KR2,0,1 I PD KEY RETURN 2,0,1
17 — I OPEN No used
18~20 LED2,0,1 O OPEN LED drive output2,0,1 L: ON
21 BACKLIGHT_ON O PD BACK LIGHT LED drive output H: ON
22~29 — O OPEN No used
30 RESET I PU u-com RESET signal detect L: RESET
31 EXTAL I OPEN MAIN CLOCK(10MHz)
32 XTAL — OPEN
33 VSS(GND) — GND GND
34 TX — OPEN No used
35 TEX(GND) I GND GND
36 AVSS(GND) — GND A/D converter GND
37 AVREF I +5V A/D converter reference voltage
38 SOL O PD MECHA solenoid control H: ON
39 R_INH_F I PU FWD REC permission detect signal input L: REC
40 PHOTO SW I PU REAL drive pulse input
41 HALF_SW I PU Cassette half detect signal input L: CASSETTE EXIST
42 PLAY SW I PU MECHA HEAD position detect L: ON
43 TYPE II I PU TYPE Ö†detect signal input L: TYPE II
44,45 LEVEL L/R I PD Lch/Rch level input
46 R_INH_R I PU RVS. REC permission detect signal input L: REC
47 CPM O PD Capstan motor control H: ON
48 CLOCK O OPEN System IC CLOCK output
49 REC/PLAY O OPEN REC/PLAY changeover H: REC L: PLAY
50 ERASE O PD ERASE HEAD control output H: ON
51 DATA O OPEN System IC DATA output
52 STB O OPEN System IC STROBE signal output
53~59 — O OPEN No used
60 BIAS NOR O PD BIAS CONTROL H: NORMAL TAPE
61~63 — I OPEN No used
64 SLOT OPEN O OPEN SLOT OPEN motor control H: ON
65 SLOT CLOSE O OPEN SLOT CLOSE motor control H: ON
66 CLOSE SW O PU SLOT CLOSE detect SW input L: ON
67 OPEN SW O PU SLOT OPEN detect SW input L: ON
68 — O OPEN No used
69 CE O PU AC OFF detect signal input L: AC OFF
70 DOLBY_RESET O OPEN DOLBY IC RESET control L: RESET
71 — O OPEN No used
72 VDD(+5V) — +5V power supply
73 — — +5V No used(Connect to VDD(+5V))
74 70/120 O PD PLAY equalizer control output H: 70µs L: 120µs
75,76 — O OPEN No used
77 AVR_OFF O PD Circuit AVR ON/OFF control H: AVR ON
78 LINE MUTE O PD LINE MUTE control output L: MUTE ON
79 REC MUTE O PD REC MUTE control output L: MUTE ON
80 S.DATA I/O OPEN Serial communication DATA signal
1-4 Pin description
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
