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CHAPTER 7 MODE SETTING
■
Relationship between mode pins and mode data
(an example showing recommended relationship)
Table 7.3-3 shows the relationship between mode pins and mode data.
Table 7.3-3 Relationship between mode pins and mode data
Single chip
Internal ROM external bus mode, 8-bit
(address data multiplex)
Internal ROM external bus mode, 16-bit
(address data multiplex)
Internal ROM external bus mode, 8-bit
(address data non-multiplex)
Internal ROM external bus mode, 16-bit
(address data non-multiplex)
External ROM external bus mode, 16-bit, bus vector
with 16-bit width (address data multiplex)
External ROM external bus mode, 8-bit
(address data multiplex)
External ROM external bus mode, 8-bit
(address data non-multiplex)
Note:
If the output for high-order addresses of A23 to A16 is suppressed, the maximum capacity of
accessible memory is 64 K bytes.
158
Mode
MD2
MD1
MD0
M1
0
1
1
0
1
1
0
1
1
0
1
1
0
1
1
0
0
1
0
0
0
0
1
0
M0
S1
S0
0
0
X
X
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
1
1
0
0
0
1
0
1
0
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