Lc876764 (Uic1) : Microcontroller; Pin Layout; Block Diagram; Description Of Major Ics 1-29~42 - JVC MX-GA77 Service Manual

Description of major ICs

LC876764 (UIC1) : Microcontroller

1.Pin layout

S48/PG0
S49/PG1
S50/PG2
S51/PG3
P00
P01
P02
P03
VSS2
VDD2
P04
P05
P06
P07
P10/SO0
P11/SI0/SB0
P12/SCK0
P13/SO1
P14/SI1/SB1
P15/SCK1

2.Block diagram

Interrupt Control
Stand-by Control
CF
RC
MRC
X' tal
SIO0
SIO1
Timer 0
(High speed clock counter)
Timer 1
Base Timer
VFD Controller
INT 0 - 5
Noise Rejection
Ti mer 4
Ti mer 5
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
Bus Interface
Port 0
Port 1
Port 3
Port 7
Port 8
ADC
Weak Signal
Detector
Ti mer 6
Ti mer 7
Watch Dog Timer
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
IR PLA
ROM
PC
ACC
B Register
C Register
AL U
PSW
RAR
RAM
Stack Pointer
S19/PC3
S18/PC2
S17/PC1
S16/PC0
VDD3
S15/T15
S14/T14
S13/T13
S12/T12
S11/T11
S10/T10
S9/T9
S8/T8
S7/T7
S6/T6
S5/T5
S4/T4
S3/T3
S2/T2
S1/T1
MX-GA77
1-29