MC68HC05C9E Datasheet, PDF (20/106 Pages) Freescale Semiconductor, Inc – Microcontrollers

Memory
Addr.
$0000
$0001
$0002
$0003
$0004
$0005
$0006
$0007
$0008
Register Name
Bit 7
Port A Data Register ^Read: _PA7
(PORTA) Write:
See page 37. _Reset:
Port B Data Register ^Read: _PB7
(PORTB) Write:
See page 38. _Reset:
Port C Data Register ^Read: _PC7
(PORTC) Write:
See page 38. _Reset:
Port D Data Register ^Read: _PD7
(PORTD) Write:
See page 38. _Reset:
Port A Data Direction Register
(DDRA)
See page 37.
Read:
DDRA7
Write:
Reset: 0
Port B Data Direction Register
(DDRB)
See page 38.
Read:
DDRB7
Write:
Reset: 0
Port C Data Direction Register
(DDRC)
See page 38.
Read:
DDRC7
Write:
Reset: 0
Port D Data Direction Register
(DDRD)
See page 38.
Read:
DDRC7
Write:
Reset: 0
Unimplemented
6
PA6
PB6
PC6
DDRA6
0
DDRB6
0
DDRC6
0
0
5
PA5
PB5
PC5
PD5
DDRA5
0
DDRB5
0
DDRC5
0
DDRC5
0
4
3
PA4
PA3
Unaffected by reset
PB4
PB3
Unaffected by reset
PC4
PC3
Unaffected by reset
PD4
PD3
Unaffected by reset
DDRA4 DDRA3
0
0
DDRB4 DDRB3
0
0
DDRC4 DDRC3
0
0
DDRC4 DDRC3
0
0
2
1
Bit 0
PA2
PA1
PA0
PB2
PB1
PB0
PC2
PC1
PC0
PD2
PD1
PD0
DDRA2 DDRA1 DDRA0
0
0
0
DDRB2 DDRB1 DDRB0
0
0
0
DDRC2 DDRC1 DDRC0
0
0
0
DDRC2 DDRC1 DDRC0
0
0
0
$0009
Unimplemented
$000A
$000B
$000C
SPI Control Register
(SPCR)
See page 64.
SPI Status Register
(SPSR)
See page 66.
SPI Data Register
(SPDR)
See page 67.
Read:
Write:
Reset:
Read:
Write:
Reset:
Read:
Write:
Reset:
SPIE
0
SPIF
0
SPD7
SPE DWOM
0
0
WCOL
0
0
SPD6
0
SPD5
= Unimplemented
MSTR
0
MODF
CPOL
0
0
CPHA
1
0
0
0
0
SPD4
SPD3
SPD2
Unaffected by reset
R
= Reserved
Figure 2-3. Input/Output Registers (Sheet 1 of 3)
SPR1
U
0
SPR0
U
0
0
SPD1
0
SPD0
U = Unaffected
MC68HC05C9E Advance Information Data Sheet, Rev. 0.1
20
Freescale Semiconductor