JVC XL-PM11 Service Manual page 12

XL-PM11/XM-PM1
M11L1644 (IC1644) : DRAM
1. Block diagram
WE
CONTROL
RAS
LOGIC
CAS
CLOCK
GENERATOR
COLUMN
ADDRESS
11
A0
BUFFER
A1
A2
REFRESH
CONTROLLER
A3
A4
REFRESH
A5
COUNTER
A6
A7
A8
A9
ROW
A10
ADDRESS
11
BUFFERS(11)
2. Pin function
Pin No.
3~11, 14~19, 7
5
21
4
20
2, 3,22, 23
1, 12
13, 24
6
XC6367 (IC6367, 63670) : Regulator
1. Pin layout
1
2
1-12
11
11
Symbol I/O
Address Input
A0~A10 I Row Address : A0~A10
Column Address : A0~A10
RAS I Row Address Strobe
CAS I Column Address Strobe
WE I Write Enable
OE I Output Enable
I/O0~I/O3 I/O Data Input/ Ountput
Vcc Power (5V or 3.3V)
Vss Ground
NC - No Connect
2. Pin function
Pin
Symbol
5
No.
1
2
4
3
4
3
5
DATA-IN BUFFER
COLUMN
11
DECODER
2048
SENSE AMPLIFIERS
I/O RATING
2048 x 4
2048 x 2048 x 4
MEMORY
2048
ARRAY
Vdd GENERATOR
Function
Function
External transistor connection
EXT
Ground
GND
Chip enable
CE
Power supply
VDD
Voltage output
VOUT
DATA-OUT
BUFFER
4
4
Vcc
Vss
I/O0
. .
4
I/O3
CE