MC68HC11KA4TS Datasheet, PDF (17/68 Pages) Motorola, Inc – 8-Bit Microcontroller

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Table 4 MC68HC11KA4 Register and Control Bit Assignments (Continued)
Bit 7
R8
R7/T7
—
6
T8
R6/T6
—
5
0
R5/T5
—
4
0
R4/T4
—
3
0
R3/T3
—
2
0
R2/T2
—
1
0
R1/T1
—
Bit 0
0
R0/T0
—
SCDRH
SCDRL
Reserved
—
—
—
—
—
—
—
—
Reserved
0
0
0
0
PH3
PH2
PH1
PH0
PORTH
0
0
0
0
DDH3 DDH2 DDH1 DDH0
DDRH
PG7
0
0
0
0
0
0
0
PORTG
DDG7
0
0
0
0
0
0
0
DDRG
HPRIO — Highest Priority I-Bit Interrupt and Miscellaneous
$003C
Bit 7
6
5
4
3
2
1
Bit 0
RBOOT* SMOD* MDA* PSEL4 PSEL3 PSEL2 PSEL1 PSEL0
RESET:
0
0
0
0
0
1
1
0
Single Chip
0
0
1
0
0
1
1
0
Expanded
1
1
0
0
0
1
1
0
Bootstrap
0
1
1
0
0
1
1
0
Special Test
*The reset values of RBOOT, SMOD, and MDA depend on the mode selected at power up.
RBOOT — Read Bootstrap ROM
Valid only when SMOD is set to one (bootstrap or special test mode). Can only be written in special
mode.
0 = Bootloader ROM disabled and not in map
1 = Bootloader ROM enabled and in map at $BE00–$BFFF
SMOD and MDA —Special Mode Select and Mode Select A
These two bits can be read at any time. SMOD can only be written to zero. MDA can only be written
once in normal modes or any time in special modes.
MODB
1
1
0
0
Inputs
MODA
0
1
0
1
Mode
Single Chip
Expanded
Bootstrap
Special Test
Latched at Reset
SMOD
MDA
0
0
0
1
1
0
1
1
PSEL[4:0] —Priority Select Bits [4:0]
Refer to 5 Resets and Interrupts.
MC68HC11KA4
MC68HC11KA4TS/D
MOTOROLA
17