MC68HC705K1 Datasheet, PDF (28/140 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Memory
Freescale Semiconductor, Inc.
Addr.
$0000
$0001
$0002
Register Name
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Port A Data Register
PA7 PA6 PA5
PA4
PA3
PA2 PA1 PA0
(PORTA) Write:
See page 64.
Reset:
Unaffected by reset
Read: 0
0
0
0
Port B Data Register
(PORTB) Write:
0
0
PB1/
OSC3
PB0
See page 69.
Reset:
Unaffected by reset
Unimplemented
$0003
Unimplemented
$0004
$0005
$0006
Read:
Data Direction Register A
DDRA7
(DDRA) Write:
See page 65.
Reset: 0
DDRA6
0
DDRA5
0
Read: 0
0
0
Data Direction Register B
(DDRB) Write:
See page 70.
Reset: 0
0
0
Unimplemented
DDRA4
0
0
0
DDRA3
0
0
0
DDRA2 DDRA1 DDRA0
0
0
0
0
DDRB1 DDRB0
0
0
0
$0007
Unimplemented
$0008
$0009
$000A
Read: TOF RTIF
Timer Status and Control
TOIE
Register (TSCR) Write:
See page 77.
Reset: 0
0
0
Read: Bit 7 Bit 6 Bit 5
Timer Counter Register
(TCNTR) Write:
See page 79.
Reset: 0
0
0
Read:
IRQ Status and Control
IRQE
0
0
Register (ISCR) Write:
See page 45.
Reset: 1
0
0
= Unimplemented
RTIE
RT1 RT0
TOFR RTIFR
0
U
U
1
1
Bit 4
Bit 3
Bit 2 Bit 1 Bit 0
0
0
0
0
0
IRQF
0
0
0
IRQR
0
0
0
U
0
R = Reserved
U = Unaffected
Figure 2-2. I/O Register Summary (Sheet 1 of 3)
Technical Data
Memory
For More Information On This Product,
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MC68HC705K1 — Rev. 2.0