Onkyo DX-C34, Service Manual

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DX-C34
IC BLOCK DIAGRAM/ TERMINAL DESCRIPTION
Q502: IC41LV16100-50T 16M BIT DYNAMIC RAM
1
2
3
4
5
6
7
8
9
10
11
15
16
17
18
19
20
21
22
23
24
25
36
35
34
33
32
31
30
29
28
27
26
50
49
48
47
46
45
44
43
42
41
40
NC
NC
WE
RAS
NC
NC
A0
A1
A2
A3
VCC
VCC
I/O0
1/O1
1/O2
1/O3
VCC
1/O4
1/O5
1/O6
1/O7
NC
GND
1/O15
1/O14
1/O13
1/O12
GND
1/O11
1/O10
1/O9
1/O8
NC
NC
LCAS
UCAS
CE
A9
A8
A7
A6
A5
A4
GND
A0-A9
I/O0-15
WE
OE
RAS
UCAS
LCAS
VCC
GND
NC
Address input
Data inputs/outputs
Write enable
Output enable
Row address strobe
Upper column address strobe
Lower column address strobe
Power
Ground
No connection
PIN DESCRIPTION
PIN CONFIGURATION
CAS
CLOCK
GENERATOR
RAS
CLOCK
GENERATOR
REFRESH
COUNTER
ADDRESS
BUFFERS
R
O
W DECODER
MEMORY ARRAY
1.048.576 x 16
SENSE AMPLIFIERS
DATA I/O BUS
COLUMN DECODES
D
A
T
A
I/O B
UFFERS
WE
CONTROL
LOGICS
OE
CONTROL
LOGICS
CAS
RAS
OE
WE
LCAS
UCAS
RAS
FUNCTIONAL BLOCK DIAGRAM
WE
I/O0-I/O15
TRUTH TABLE
Function RAS LCAS UCAS WE OE Address t
R
/t
C
I/O
Standby H H H X X X High-Z
Read: Word L L L H L ROW/COL Dout
Read: Lower Byte L L H H L ROW/COL Lower Byte. Dout
Upper Byte, High-Z
Read: Upper Byte L H L H L ROW/COL Lower Byte, High-Z
Upper Byte. Dout
Write: Word (Early Write) L L L L X ROW/COL Din
Write: Lower Byte (Early Write) L L H L X ROW/COL Lower Byte. Din
Upper Byte, High-Z
Write: Upper Byte (Early Write) L H L L X ROW/COL Lower Byte, High-Z
Upper Byte. Din
Read Write L L L H L H L ROW/COL Dout, Din
EDO Page-Mode Read 1st Cycle L H L H L H L ROW/COL Dout
2nd Cycle L H L H L H L NA/COL Dout
Any Cycle L L H L H H L NA/NA Dout
EDO Page-Mode Read 1st Cycle L H L H L L X ROW/COL Din
2nd Cycle L H L H L L X NA/COL Din
EDO Page-Mode 1st Cycle L H L H L H L L ROW/COL Dout, Din
Read-Write 2nd Cycle L H L H L H L L H NA/COL Dout, Din
Hidden Refresh 1st Cycle L H L L L H L ROW/COL Dout
2nd Cycle L H L L L L X ROW/COL Dout
RAS-Only Refresh L H H X X ROW/NA High-Z
CBR Refresh H L L L X X X High-Z