Read Sharp DV-NC55 (serv.man11) Service Manual online
61
DV-NC55S/H
DV-NC60H
DV-NC60H
Output
Buffer
Output
Buffer
Input
Buffer
Input
Buffer
ID
Register
DATA
QUEUE
REGISTER
CSR
ESRs
Data
Comparator
DQ
8-14
DQ
0-7
I/O Logic
OUTPUT MULTIPLEXER
Register
Program Erase
Voltage Switch
BYTE#
CUI
WSM
16-KBYTE
Block 31
16-KBYTE
Block 30
16-KBYTE
Block 1
16-KBYTE
Block 0
CE#
OE#
WR#
RP#
RY/BY#
V
PP
V
CC
GND
Y GATING/SENSING
Y-DECODER
X-DECODER
Input
Buffer
ADDRESS
QUEUE
LATCHES
ADDRESS
COUNTER
COUNTER
A
-1.0~18
• Block Diagram
• Block Diagram
RAS clock
generator
CAS clock
generator
WE clock
generator
Data I/O Bus
Column decoders
Sense amplifiers
Refresh
counter
Address buffers
and predecoders
Row
decoders
Memory
array
OE clock
generator
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O8
I/O9
I/O10
I/O11
I/O12
I/O13
I/O14
I/O15
I/O16
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O8
I/O9
I/O10
I/O11
I/O12
I/O13
I/O14
I/O15
I/O16
I/O
Buffer
9
Y
0
-Y
8
X
0
-X
8
512
512 16
OE
WE
UCAS
LCAS
RAS
V
CC
V
SS
A0
A1
A1
A7
A8
A8
12-3. IC502 IX1765GE
4M EDO DRAM
Terminal
Terminal name
Function
16-19, 22-26
A
0
-A
8
Address inputs.
14
RAS
Row address strobe.
28
UCAS
Column address strobe/upper byte control.
29
LCAS
Column address strobe/lower byte control.
13
WE
Write enable.
27
OE
Output enable.
2-5, 7-10
DQ
1
-DQ
16
Data inputs/outputs.
31-34, 36-39
1, 6, 20
V
CC
+3.3V power supply.
21, 35, 40
V
SS
0V ground.
11-12, 15, 30
NC
No connection.
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