3-13. EXTERNAL MEMORY
3-13-1. SRAM (BS62LV4006SCP-70)
512K bytes S-RAM used as an external RAM for PLU and Electric Journal and etc.
P00 through P07 are multiplex bus that consists of data bus (D0-D7).
P20 through P27 are multiplex bus that consists of data bus (A0-A7).
P30 through P37 are multiplex bus that consists of data bus (A8-A15).
P40 is multiplex bus that consists of data bus (A16).
P41 is multiplex bus that consists of data bus (A17).
P42 is multiplex bus that consists of data bus (A18).
P45 is used for chip select at RAM.
P52 is used for Output Enable, P50 is used for Write Enable control.
EXTERNAL MEMORY CIRCUIT
D6
D2
D1
D0
D4
D5
D3
D7
A10
A0
A17
A6
A3
A4
A2
A11
A8
A1
A14
A7
A12
A13
A16
A9
A15
A5
C79
*0.01uF
VBB
C19
0.1uF
A18
RD#
WR#
C73
*100pF
A0
12
A1
11
A2
10
A3
9
A4
8
A5
7
A6
6
A7
5
A8
27
A9
26
A10
23
A11
25
A12
4
A13
28
A14
3
A15
31
A16
2
CE
22
A17/CE2
30
WE
29
OE
24
D0
13
D1
14
D2
15
D3
17
D4
18
D5
19
D6
20
D7
21
VCC
32
GND
16
A18/A17
1
U3
BS62LV4006SCP-70
RAMCS#
Service Manual
52
Summary of Contents for ECR8200
Page 1: ...Cash Register ECR 8200 8220 SWEDEN SERVICE MANUAL Code Y110930 6 Service Manual 1...
Page 37: ...3 3 M30842MC MICROCOMPUTER Refer to the specification attached Service Manual 37...
Page 38: ...Port Assignment for ECR8200 8220 SWEDEN M30842MC Service Manual 38...
Page 39: ...Service Manual 39...
Page 51: ...Service Manual 51...
Page 53: ...S RAM PIN Configuration Refer to the specification attached data sheet Service Manual 53...
Page 56: ...Service Manual 56...
Page 63: ...Service Manual 63...
Page 64: ...Service Manual 64...
Page 65: ...Service Manual 65...
Page 66: ...ECR8220 SWEDEN Service Manual 66...
Page 67: ...Service Manual 67...
Page 68: ...Service Manual 68...
Page 69: ...It means OK when no error occurs through the checkup Service Manual 69...
Page 70: ...FINISHED GOODS CHECK LIST ECR8200 SWEDEN Service Manual 70...
Page 71: ...Service Manual 71...
Page 72: ...Service Manual 72...
Page 73: ...Service Manual 73...
Page 74: ...ECR8220 SWEDEN Service Manual 74...
Page 75: ...Service Manual 75...
Page 76: ...Service Manual 76...
Page 77: ...Service Manual 77...
Page 86: ...17 It shows Up Load OK 18 Click Ver button Service Manual 86...
Page 109: ...ECR8200 SWEDEN 11 FIX SEMI SET TO BOTTOM CASE SEMI SET Service Manual 109...
Page 112: ...14 COPLETE AND FUNCTION TEST BATTERY ASSY UNIT WINDING REEL Service Manual 112...
Page 121: ...8 EXPLODED DIAGRAM ECR8200 SWEDEN Service Manual 121...