17
AVR-550SD
SN74VHCU04N (I/O: IC7)
RC1117-25 (MAIN: IC215)
RC1117-33 (MAIN: IC404)
NJM2068M (MAIN: IC220~222,231~242)
MM74LCX244 (MAIN: IC225,227,228) MM74HCT244 (MAIN: IC226)
NJM4560M (MAIN: IC230)
M29W800AT (MAIN: IC224)
#
$
20
1
19
2
18
3
17
4
16
5
15
6
14
7
13
8
12
9
11
10
1G
2G
1A
0
2A
0
2A
3
2Y
0
1Y
0
1Y
3
1A
1
2Y
1
1A
2
2Y
2
1Y
1
2A
1
1Y
2
2A
2
1A
3
2Y
3
GND
V
CC
74LCX244 (IC809~811)
1
2
3
4
5
6
7
8
20
19
18
16
15
14
13
I3
VCC
OE2
O2
I5
O0
I4
O1
I6
OE
I0
O4
I1
O5
I2
O6
9
12
O7
O3
10
11
GND
I7
TOP VIEW
17
PIN DESCRIPTION
Pin Name
Address Inputs
Symbol
A0-A18
Data Input/Outputs, Command Inputs
DQ0-DQ7
Data Input/Outputs
DQ8-DQ14
Data Input/Output or Address Input
DQ15A-1
Chip Enable
Output Enable
Write Enable
Reset/Block Temporary Unprotect
Ready/Busy Output
RB
Byte/Word Organization
BYTE
Supply Voltage
V
CC
Ground
V
SS
No Connected Internally
NC
Don’t Use as Internally Connected
DU
E
G
W
RP
A1
A0
A2
E
A3
V
SS
A4
G
A5
DQ0
A6
DQ8
A7
DQ1
A17
DQ9
A18
DQ2
RB
DQ10
NC
DQ3
NC
DQ11
RP
V
CC
W
DQ4
NC
DQ12
NC
DQ5
A8
DQ13
A9
DQ6
A10
DQ14
A11
DQ7
A12
DQ15A-1
A13
V
SS
A14
BYTE
A15
A16
24
13
12
1
25
36
37
48
M29W800T
M29W800T
19
A0-A18
W
DQ0-DQ14
M29W800AT
E
15
G
RP
DQ15A-1
BYTE
RB
V
CC
V
ss
Summary of Contents for AVR-550SD
Page 3: ...3 AVR 550SD LEVEL DIAGRAM...
Page 4: ...4 AVR 550SD...
Page 5: ...5 AVR 550SD BLOCK DIAGRAM...
Page 11: ...11 AVR 550SD Functions...
Page 18: ...18 AVR 550SD CXP7400P10 MAIN IC401 Block Diagram...
Page 20: ...20 AVR 550SD LC74781 VIDEO IC609...
Page 23: ...23 AVR 550SD 2 FL DISPLAY 15 ST 43GN PIN CONNECTION GRID ASSINMENT 46 45 90 1...
Page 24: ...24 AVR 550SD ANODE CONNECTION...
Page 25: ...25 AVR 550SD PRINTED WIRING BOARDS MAIN P W B UNIT COMPONENT SIDE...
Page 26: ...26 AVR 550SD FOIL SIDE...
Page 27: ...27 AVR 550SD VIDEO P W B UNIT COMPONENT SIDE...
Page 28: ...28 AVR 550SD FOIL SIDE...
Page 29: ...29 AVR 550SD FRONT P W B UNIT COMPONENT SIDE...
Page 30: ...30 AVR 550SD FRONT P W B UNIT FRONT P W B UNIT FRONT P W B UNIT FOIL SIDE FOIL SIDE...
Page 31: ...31 AVR 550SD SMPS P W B UNIT...
Page 60: ...60 AVR 550SD LEVEL DIAGRAM...