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Flash Rom1 Address Circuit; Memory Map - Casio CE-6000 Service Manual

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6-5. Flash ROM1 address circuit

The Flash ROM1 address signals FA17 to FA20 are made by the following circuit.
The Flash ROM1 (LH28F016SCT-L95, 16M bits) is used for the application program.
CPU address
BANK port
A19 A18 A17 FC2
FC1
H
L
L
L
L
L
H
L
L
H
L
H
X
L
H
L
H
H
H
H
X
X

6-6. Memory map

The memory table is as follows:
RAM enable
2CS 3CS 4CS 8CS CCS A18 A19 RAM BANK
H
L
H
H
H
H
L
H
H
H
H
L
H
H
H
L
H
H
H
L
H
H
H
L
L
X
X
X
X
H
H
L
X
H
H
L
X
H
H
L
X
H
H
H
H
H
H
H
H
H
H
H
Flash ROM1 (16M bits)
Flash memory address
FC0
BANK
FA20 FA19 FA18 FA17 Memory block No. 8M bank 16M bank
L
0 L
L
H
1 L
H
X
2 A18
A17
L
3 H
L
H
4 H
H
X
Common L
L
No.
RB0 RB1 RB2 RB3 RB4 FB0 FB1 FB2 C S A16 C S
H
H
L
L
COM X
X
H
H
L
L
COM X
X
H
H
H
L
0 L
H
1 H
H
H
H
H
L
L
L
H
L
H
H
H
L
L
H
H
H
H
H
H
L
2 L
L
3 H
L
4 L
H
5 H
H
6 L
L
7 H
L
8 L
H
9 H
H
10 L
L
11 H
L
12 L
H
13 H
H
14 L
L
15 H
L
16 L
H
17 H
H
X
X
X
X
X
X
H
H
H
L
H
L
H
L
H
H
H
L
L
L
H
L
L
L
H
L
L
L
H
L
L
L
H
L
H
H
H
L
X
L
X
L
L
H
L
H
X
X
X
X
L
H
L
H
X
X
H
L
H
H
X
X
- 13 -
A18
A17
02 to 07
A18
A17
0A to 0F
L
L
08,09
10,11,18,19
A18
A17
12 to 17
A18
A17
1A to 1F
L
L
00,01
Flash BANK
RAM1
X
X
X
X
X
X
L
X
X
X
X
X
X
L
L
L
X
X
X
X
H
L
L
X
X
X
X
H
H
L
X
X
X
X
H
H
L
X
X
X
X
H
H
L
X
X
X
X
H
H
L
X
X
X
X
H
L
H
L
X
X
X
H
L
H
L
X
X
X
H
L
H
L
X
X
X
H
L
H
L
X
X
X
H
H
H
L
X
X
X
H
H
H
L
X
X
X
H
H
H
L
X
X
X
H
H
H
L
X
X
X
H
L
H
H
X
X
X
H
L
H
H
X
X
X
H
L
H
H
X
X
X
H
L
H
H
X
X
X
H
H
H
H
X
X
X
H
H
H
H
X
X
X
H
H
H
H
X
X
X
H
H
H
H
X
X
X
H
X
X
X
X
X
X
H
L
L
X
L
H
L
H
L
L
X
H
H
L
H
L
L
L
L
L
L
H
L
L
L
L
L
L
H
L
L
H
L
L
L
H
L
L
H
L
L
L
H
L
L
L
H
L
L
H
L
L
L
H
L
L
H
L
L
H
H
L
L
H
L
L
H
H
L
L
H
L
L
X
L
X
H
H
L
L
X
H
X
H
H
X
X
X
L
X
H
H
X
X
X
H
X
H
H
X
X
X
X
X
L
H
X
X
X
X
X
X
H
NOTE
Common
Flash1
A18
L
H
X
H
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
X
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
H
X
X
L
A18
X
L
A18
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