MC68HC711KS2MFN4 Freescale Semiconductor, MC68HC711KS2MFN4 Datasheet - Page 246

• Manufacturer Part Number: MC68HC711KS2MFN4
• Description: 32K EPROM - SLOW MODE
• Manufacturer: Freescale Semiconductor

Memory Expansion and Chip Selects
11.4.4 One Chip Select Driving Another
Technical Data
246
The general-purpose chip selects can be programmed to drive other
chip-select signals as well as their own memory areas. Although all of
the eight possible combinations of the bits G1DG2, G1DPC, and G2DPC
are allowed, some combinations cause operations which do not
perform as one might expect. The results of all combinations are defined
in
The table assumes that none of the chip-select ranges overlap.
Table
G2SZ[A:D]
1100–1111
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
1 0 0 0
1 0 0 1
1 0 1 0
1 0 1 1
Table 11-7. General-Purpose Chip Select 2 Size Control
Memory Expansion and Chip Selects
11-8. The priorities defined in the previous sections still apply.
Follow window 1
Follow window 2
Default to 512 K
Disabled
(Bytes)
128 K
256 K
512 K
Size
16 K
32 K
64 K
2 K
4 K
8 K
(MXGS2 = 0)
G2A[15:11]
G2A[15:11]
G2A[15:13]
G2A[15:14]
Valid Bits
G2A[15]
None
None
None
None
None
None
None
None
M68HC11K Family
(MXGS2 = 1)
G2A[18:12]
G2A[18:13]
G2A[18:14]
G2A[18:15]
G2A[18:16]
G2A[18:17]
G2A[18:11]
Valid Bits
G2A18
None
None
None
None
None
MOTOROLA