M68HC11K Datasheet, PDF (247/290 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Memory Expansion and Chip Selects
Chip Selects
11.4.4.1 General-Purpose Chip Select 1 Control Register
Address: $005D
Bit 7
6
5
4
3
2
1
Read:
G1DG2 G1DPC G1POL
Write:
G1AV
G1SZA G1SZB G1SCC
Reset: 0
0
0
0
0
0
0
Figure 11-12. General-Purpose Chip Select 1
Control Register (GPCS1C)
Bit 0
G1SZD
0
G1DG2 — GPCS 1 Drives GPCS 2 Bit
0 = CSGP1 does not affect CSGP2.
1 = CSGP1 and CSGP2 are ORed and driven out of the CSGP2.
G1DPC — General-Purpose Chip Select 1 Drives Program Chip
Select Bit
0 = CSGP1 does not affect CSPROG.
1 = CSGP1 and CSPROG are ORed and driven out of the
CSPROG.
11.4.4.2 General-Purpose Chip Select 2 Control Register
Address: $005F
Bit 7
6
5
4
3
2
1
Read:
0
Write:
G2DPC G2POL G2AV G2SZA G2SZB G2SZC
Reset: 0
0
0
0
0
0
0
Figure 11-13. General-Purpose Chip Select 2
Control Register (GPCS2C)
Bit 0
G2SZD
0
G2DPC — General-Purpose Chip Select 2 Drives Program Chip
Select Bit
0 = Does not affect program chip select
1 = CSGP2 and CSPROG are ORed and driven out of the
CSPROG pin.
M68HC11K Family
MOTOROLA
Memory Expansion and Chip Selects
For More Information On This Product,
Go to: www.freescale.com
Technical Data
247