General Information - Pioneer MJ-L5 Service Manual

7. GENERAL INFORMATION

7.1 IC
• The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams.
•
List of IC
M5M4V4400CTP-7, M56758FP, PD5450A, LR376481, BD7910FV, BR93LC56F, IR3R55M, AK4520A, PDG225A,
LV1035M, PDC046
M5M4V4400CTP-7 (MD CORE MAIN UNIT : IC103)
• DRAM
•
Pin Assignment (Top View)
DQ1
26
1
DQ2
2 25
24
W 3
23
RAS 4
A9
5 22
9 18
A0
A1 17
10
A2 11 16
A3
12 15
VCC
14
13
•
Block Diagram
23
CAS
4
RAS
W
3
A0
9
A1
10
A2
11
A3
12
A4
14
A5
15
A6 16
A7 17
A8
18
A9
5
•
Pin Function
No. Name
VSS
1 DQ1
DQ4
Data Input/Output
DQ3
2 DQ2
CAS
3 W Write control input
OE
4 RAS Line address strobe input
5 A9 Address input
6
A8
|
A7
8
A6
9 A0
A5
| | Address input
A4
12 A3
13 Vcc Power supply voltage (+3.3 V)
Clock Generation Circuit
Column Decoder
Sense Reflesh Amp.
Control Circuit
(4194304bits)
Description
No.
14
|
18
19
|
21
22
23
24
25
26
Input
Buffer
Input/Output
Output
Buffer
Memory Cell
MJ-L5, SP-L5
Name Description
A4
| Address input
A8
OE Output-enable input
CAS Column address strobe input
DQ3
Data Input/Output
DQ4
Vss Ground (0 V)
Vcc (3.3V)
13
Vss (0V)
26
DQ1
1
2 DQ2
DQ3
24
DQ4
25
OE
22
59