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MC68HC11 Datasheet, PDF (33/80 Pages) Motorola, Inc – Technical Summary 8-Bit Microcontroller | |||
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IOCSA âI/O Chip Select Address Valid
0 = Valid during E-clock high time
1 = Valid during address valid time
IOSZ âI/O Chip Select Size Select
0 = $1000â$1FFF (4 Kbyte)
1 = $0000â$1FFF (8 Kbyte)
GCSPR âGeneral-Purpose Chip Select Priority
0 = Program chip select has priority over general-purpose chip selects
1 = General-purpose chip selects have priority over program chip select
PCSEN âProgram Chip Select Enable
0 = CSPROG disabled
1 = CSPROG enabled
PCSZA, PCSZB âProgram Chip Select Size (A or B)
PCSZA
0
0
1
1
PCSZB
0
1
0
1
Size (Bytes)
64 K
32 K
16 K
8K
Address Range
$0000â$FFFF
$8000â$FFFF
$C000â$FFFF
$E000â$FFFF
CSCSTR âChip Select Clock Stretch
$005A
RESET:
Bit 7
IOSA
0
0
6
IOSB
0
0
5
4
3
2
1 Bit 0
GP1SA GP1SB GP2SA GP2SB PCSA PCSB
0
0
0
0
0
1 Normal Modes
0
0
0
0
0
0 Special Modes
IOSA, IOSB âCSIO Stretch Select
GP1SA, GP1SB âCSGP1 Stretch Select
GP2SA, GP2SB âCSGP2 Stretch Select
PCSA, PCSB âCSPROG Stretch Select
Bit [A:B]
00
01
10
11
Clock Stretch
None
1 Cycle
2 Cycles
3 Cycles
GPCS1A âGeneral-Purpose Chip Select 1 Address
$005C
RESET:
Bit 7
G1A18
0
6
G1A17
0
5
G1A16
0
4
G1A15
0
3
G1A14
0
2
G1A13
0
1
G1A12
0
Bit 0
G1A11
0
G1A[18:11] âGeneral-Purpose Chip Select 1 Address
Selects the starting address of general-purpose chip select 1 range. Refer to the G1SZAâG1SZD table.
M68HC11 K Series
MC68HC11KTS/D
MOTOROLA
33
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