JVC TH-A10 Service Manual page 33

HY57V161610DTC8 or KM416S1120DT-G8 (IC504,IC505) : 16MB SDRAM
1.Block diagram
CLK
Clock
Generator
CKE
Address
CS
RAS
CAS
WE
2.Pin function
Pin No. Symbol
1
VCC
2,3
DQ0,1
4
VSS
5,6
DQ2,3
7
VDD
8,9
DQ4,5
10
VSS
11,12
DQ6,7
13
VCC
14
LDQM
15
WE
16
CAS
17
RAS
18
CS
19,20
A11,10
21~24
A0~3
25
VCC
Row
address
buffer &
Mode
Refresh
register
counter
Column
address
buffer &
burst
counter
Description
Power supply
Data input/output
Connect to GND
Data input/output
Power supply
Data input/output
Connect to GND
Data input/output
Power supply
Lower DQ mask enable
Write enable
Column address strobe
Row address strobe
Chip enable
Address inputs
Address inputs
Power supply
Bank B
Bank A
Sense amplifier
Column decoder
& latch circuit
Data counter
Pin No. Symbol
VSS
26
A4~9
27~32
NC
33
CKE
34
CLK
35
UDQM
36
NC
37
VCC
38
DQ8,9
39,40
VSS
41
DQ10,11
42,43
VDD
44
DQ12,13
45,46
VSS
47
DQ14,15
48,49
VSS
50
DQM
DQ
Description
Connect to GND
Address inputs
Non connect
Clock enable
System clock input
Upper DQ mask enable
Non connect
Power supply
Data input/output
Connect to GND
Data input/output
Power supply
Data input/output
Connect to GND
Data input/output
Connect to GND
TH-A10
1-33