Yamaha MDX-596 Service Manual page 30

MDX-596
IC1202 : IX2474AF
4M Bit D-RAM
4
RAS
17
CAS
5
A0
A9 15
20
V
SS
17
CAS
Pin No. Name
1, 2 DQ0, DQ1
3 WE
4 RAS
5 A9
6 — 9 A0-A3
10 VDD
11 — 15 A4-A8
16 OE
17 CAS
18, 19 DQ2, DQ3
20 Vss
IC1402 : 58X2402T
EEPROM
Pin No. Name
1 — 3 A0 — A2
4 VSS
5 SDA
6 SCL
7 WP
8 VCC
29
Clock Generator
CBR Refresh SELF Refresh
Counter Timer
MN42V4400 only
Row Address
Row Decoder
Buffer
Row Address
Column Decoder
Buffer
On ChipVBB
V
BB
Generator
Data input/data output
Write enable
Low address strobe
Address input
Address input
Power supply (3.3V)
Address input
Output enable
Column address strobe
Data input/data output
Power supply (0V)
8 7 6 5
1 2 3 4
Function
Device address
Ground
Serial data input/output
Serial clock input
Write protect
Power supply
Memory
Word Driver
Cell
Sense Amp.
I/O
Selection
Function
Write Clock
3
WE
Generator
Data Input
Buffer
1
2
DQ0~DQ3
18
19
Data Output
16
OE
Buffer