MC68HC11KW1 Datasheet, PDF (81/238 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor HCMOS) microcontroller unit

Table 4-15 General-purpose chip select 1 size control
A
G1SZx
B
C
D
Size (bytes)
Valid bits
Valid bits
(MXGS1 = 0) (MXGS1 = 1)
0
0
0
0
Disabled
None
None
0
0
0
1
2K
G1A[15:11] G1A[18:11]
0
0
1
0
0
0
1
1
4K
G1A[15:12] G1A[18:12]
8K
G1A[15:13] G1A[18:13]
4
0
1
0
0
16 K
G1A[15:14] G1A[18:14]
0
1
0
1
32 K
A15
G1A[18:15]
0
1
1
0
64 K
None
G1A[18:16]
0
1
1
1
128 K
None
G1A[18:17]
1
0
0
0
256 K
None
G1A18
1
0
0
1
512 K
None
None
1
0
1
0 Follow window 1
None
None
1
0
1
1 Follow window 2
None
None
1100–1111
Default to 512 K
None
None
4.5.5.3 GPCS2A — General-purpose chip select 2 address
register
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Gen. purpose chip select 2 addr. (GPCS2A) $005E G2A18 G2A17 G2A16 G2A15 G2A14 G2A13 G2A12 G2A11 0000 0000
G2A[18:11] — General-purpose chip select 2 address
These bits select the starting address of general-purpose chip select 2 range. Refer to Table 4-16.
4.5.5.4 GPCS2C — General-purpose chip select 2 control register
Address
Gen. purpose chip select 2 con. (GPCS2C) $005F
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
0 G2DPC G2POL G2AV G2SZA G2SZB G2SZC G2SZD 0000 0000
Bit 7 — Not implemented; always reads zero.
G2DPC — General-purpose chip select 2 drives program chip select
1 (set) – CSGP2 and CSPROG are OR'ed and driven out the CSPROG pin.
0 (clear) – Does not affect program chip select.
MC68HC11KW1
OPERATING MODES AND ON-CHIP MEMORY
4-37