Sanyo DC-PT70 Service Manual page 19

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
IC231 LA1844ML(AM/FM-ZF/MPX)
24 23
ALC
AM
OSC
BUFF
LEVEL
DET
S-CURVE
FM
FM
IF
DET
1 2
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
22 21 20
AM
AM
MIX
RF.AMP
AGC
AM
AM
DET
IF
AM/FM
IF
COMP
BUFF
TUNING
DRIVE
REG GND
3 4 5
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
19 18 17
DECODER
ANTI-BIRDIE
P-DET
VCO
304kHz
6 7 8
- 18 -
IO0
16
:
IO15
DATA-OUT
BUFFER
OE
16
V
CC
V
SS
DESCRIPTION
16 15 14
PILOT
CANCEL
STEREO
SW
FF
FF FF
38k 19k 19k
2
VCC
9 10 11
13
PILOT
DET
12