Sanyo DC-TS780 Service Manual page 20

IC BLOCK DIAGRAM & DESCRIPTION
IC131 M11L416256SA-35T(256k x 16 DRAM)
WE
RAS
CASL
CASH
A0
A1
A2
A3
A4
A5
A6
A7
A8
PIN DESCRIPTIONS
16~19,22~26
2~5,7~10,31~34,36~39
11,12,15,30
IC402 KA78R12STU(Regulator)
Vin 1
THERMAL SHUTDOWN
BANDGAP REFERENCE
OUTPUT
HIGH/LOW
ON/OFF
Vdis 4
1.4V
CONTROL
LOGIC
CLOCK
GENERATOR
COLUMN
9
ADDRESS
BUFFER
REFRESH
CONTROLER
REFRESH
COUNTER
9 9
ROW.
9
ADDRESS
BUFFERS(9)
PIN NO. PIN NAME
A0~A8
14
RAS
28
CASH
29
CASL
13
WE
27
OE
I/O0 ~ I/O15
1,6,20 V
CC
21,35,40 V
SS
NC
Q1
OVERVOLTAGE
PROTECTION
R1
SOA PROTECTION
SHORT-CIRCUIT
PROTECTION
R2
3
GND
DATA-IN BUFFER
COLUMN
9
DECODER
512
16
SENSE AMPLIFIERS
I/O GATING 8
512 x 16
512 x 512 x 16
MEMORY
512
9
ARRAY
V GENERATOR
BB
TYPE
Address Input
Input
Row Address : A0~A8
Column Address : A0~A8
Input Row Address Strobe
Input Column Address Strobe / Upper Byte Control
Input Column Address Strobe / Lower Byte Control
Input Write Enable
Input Output Enable
Input / Output Data Input / Output
Supply Power, 3.3V
Ground Ground
- No Connect
IC410,411 PQ1CG21H2RZ(Regulator)
2 V
O
1
V
IN
Overcurrent
detection
circuit
Overheat
detection
circuit
- 19 -
IO0
16
:
IO15
DATA-OUT
BUFFER
OE
16
V
CC
V
SS
DESCRIPTION
Constant-
ON/OFF
voltage
Circuit
circuit
-
+
Soft start
Q
R
OSC
-
S
+
3
COM
2
V
OUT
5 ON/OFF
4 Oadj