Upd78064Gf-108 (Ic701) : System Cpu - JVC UX-T77 Service Manual

UX-T77

UPD78064GF-108 (IC701) : System CPU

1.Pin layout
100 ~
1
30
31 ~
2.Pin function
Pin
Symbol
I/O
No.
1 USDATA I/O
Serial data
2 USCK O
Serial clock
3 UQRIN I
CD Q code data
4 UNC -
Non connect
5 USQCK O
CD Q code data synchronizing clock
6 -
ICVSS Connected to VSS
7 -
UX2 Main system clock
8 I
UX1 Main system clock
9 -
VDD Power supply
10 I
UXT1 Sub system clock
11 -
UXT2 Sub system clock
12 I
URESET Reset
13 I
UREM Remote control
14 -
URDSCK Non connect
15 I
UJOG1 Jog encoder 1
16 O
UBEAT2 Main clock selection 2
17 O
UBEAT1 Main clock selection 1
18 O
U+BCTL Switched 5V control
19 O
UXRESET CD LSI reset
20 O
UMCLK CD LSI command clock
21 O
UMDATA CD LSI command data
22 O
UMLD CD LSI command load
23 O
UPBMUTE Tape playback mute
24 O
ULATCH Tape IC strobe
25 I
UREEL Tape end detection
26 O
UFAUX Function AUX
27 -
UAVSS AD converter GND
28 I
USAFEYCD CD abnormal voltage detection
1-26
81
80
51
50
Function
Pin
Symbol
I/O
No.
29 URESET/CLOSE
30 USAFETY1
31 USAFETY0
32 UKEY1
33 UKEY0
34
UTAPE0
35
UTAPE1
36
AVDD
37
UAVREF
38
UBUP
39 O
UFTUNER
40
VSS
41
UMPX
42 O
UPERIOD
43
UJOGB
44 O
UBASS
45 O
UTRE
46 O
UVOL
47 O
USBASS
48 O
USMUTE
49 O
UPOUT
50 O
UFCD
51~54 O
COM0~3
55
BIAS
56~58
VLC0~2
VSS
59
O
60~99 S0~39
100 USTATUS
Function
[RESET/CLOSE] switch
I
Abnormal voltage detection 1
I
Abnormal voltage detection 2
I
Body key input 1
I
Body key input 0
I
Tape switch 0
I
Tape switch 1
I
AD converter power supply
-
AD converter reference voltage
-
Backup power supply decision
I
Function tuner
GND
-
FM stereo detection
I
Tuner PLL strobe
JOG encoder 2
I
BASS control
TRE control
VOL.control
AHB on/off
System muting
Power ON/OFF
Function CD
LCD common
LCD bias voltage
-
LCD bias voltage
-
GND
-
LCD segment
LCD LSI status
I