Service manual
DV-L70S
DV-L70BL
DV-L70W
28
Pin1~15........ There is a possibility of simultaneous change. Operating frequency: Approx. 10 MHz
Pin18~47 ..... There is a possibility of simultaneous change.(Static signal) Operating frequency: Approx. 1 MHz
Pin50~57 ..... There is almost no possibility of simultaneous change. Operating frequency: Approx. 1 MHz
Pin63............ Not used
Data Buffer
Latch D
Data Buffer
Latch C
Data Buffer
Latch B
Data Buffer
Latch A
Data Buffer
R/W CTL
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16151413121110987654321
VDD
EXPD(3)
EXPD(4)
EXPD(5)
BUFDO
BUFDI
SBUFBO
SBUFBI
SBUFAO
SBUFAI
MRST
MODE
BUFCO
TEST
BUFCI
VSS
VDD
SOUT(3)
SOUT(4)
SOUT(5)
MRST
MODE
SEL
TEST
CK
VSS
VSS
EXPD(2)
EXPD(1)
EXPD(0)
EXPC(5)
EXPC(4)
EXPC(3)
VSS
EXPC(2)
EXPC(1)
EXPC(0)
EXPBU(3)
EXPBU(2)
EXPBU(1)
EXPBU(0)
VDD
VSS
SOUT(2)
SOUT(1)
SOUT(0)
S2(5)
S2(4)
S2(3)
VSS
S2(2)
S2(1)
S2(0)
Q2(7)
Q2(6)
Q2(5)
Q2(4)
VDD
VSS
EXPBL(3)
EXPBL(2)
EXPBL(1)
EXPBL(0)
EXPAU(3)
EXPAU(2)
VDD
VSS
EXPAU(1)
EXPAU(0)
EXPAL(3)
EXPAL(2)
EXPAL(1)
EXPAL(0)
VDD
VSS
Q2(3)
Q2(2)
Q2(1)
Q2(0)
Q1(7)
Q1(6)
VDD
VSS
Q1(5)
Q1(4)
Q1(3)
Q1(2)
Q1(1)
Q1(0)
VDD
VDD
HADR0
HADR1
HADR2
HCS
HWR
HRD
HDAT0
HDAT1
HDAT2
HDAT3
HDAT4
HDAT5
HDAT6
HDAT7
VSS
VDD
D(0)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
S1(0)
S1(1)
S1(2)
S1(3)
S1(4)
S1(5)
VSS
In/Output Pin
Exclusive-use pin
In/Output Pin
In/Output Pin
In/Output Pin
In/Output Pin
Output:
Open drain
Input Pin
In/Output Pin
Output: Open drain
• Block Diagram