MC68HC908QB8 Datasheet, PDF (25/236 Pages) Freescale Semiconductor, Inc – To provide the most up-to-date information, the revision of our documents

Direct Page Registers
Addr.
$0000
$0001
$0002
↓
$0003
Register Name
Port A Data Register
(PTA)
See page 104.
Port B Data Register
(PTB)
See page 106.
Read:
Write:
Reset:
Read:
Write:
Reset:
Bit 7
R
PTB7
Reserved
6
AWUL
5
PTA5
PTB6
PTB5
4
3
PTA4
PTA3
Unaffected by reset
PTB4
PTB3
Unaffected by reset
2
PTA2
PTB2
1
PTA1
PTB1
Bit 0
PTA0
PTB0
$0004
$0005
$0006
↓
$000A
Data Direction Register A
(DDRA)
See page 104.
Data Direction Register B
(DDRB)
See page 107.
Read:
Write:
Reset:
Read:
Write:
Reset:
R
0
DDRB7
0
Reserved
R
0
DDRB6
0
DDRA5
0
DDRB5
0
DDRA4
0
DDRB4
0
DDRA3
0
DDRB3
0
0
0
DDRB2
0
DDRA1
0
DDRB1
0
DDRA0
0
DDRB0
0
$000B
$000C
$000D
$000E
$000F
$0010
$0011
$0012
$0013
Port A Input Pullup Enable
Register (PTAPUE)
See page 105.
Port B Input Pullup Enable
Register (PTBPUE)
See page 108.
SPI Control Register
(SPCR)
See page 171.
SPI Status and Control
Register (SPSCR)
See page 172.
SPI Data Register
(SPDR)
See page 174.
ESCI Control Register 1
(SCC1)
See page 122.
ESCI Control Register 2
(SCC2)
See page 124.
ESCI Control Register 3
(SCC3)
See page 125.
ESCI Status Register 1
(SCS1)
See page 126.
Read: _OSC2EN
Write:
Reset: 0
Read: _PTBPUE7
Write:
Reset: 0
Read: _SPRIE
Write:
Reset: 0
Read: SPRF
Write:
Reset: 0
Read: R7
Write: T7
Reset:
Read: _LOOPS
Write:
Reset: 0
Read: _SCTIE
Write:
Reset: 0
Read: R8
Write:
Reset: U
Read: SCTE
Write:
Reset: 1
0
PTAPUE5
0
0
PTBPUE6 PTBPUE5
0
0
R
SPMSTR
0
ERRIE
1
OVRF
0
0
R6
R5
T6
T5
ENSCI
0
TCIE
0
T8
0
TC
TXINV
0
SCRIE
0
R
0
SCRF
1
0
= Unimplemented
PTAPUE4 PTAPUE3 PTAPUE2 PTAPUE1
0
0
0
0
PTBPUE4 PTBPUE3 PTBPUE2 PTBPUE1
0
0
0
0
CPOL CPHA SPWOM SPE
0
MODF
1
SPTE
0
MODFEN
0
SPR1
0
1
0
0
R4
R3
R2
R1
T4
T3
T2
T1
Unaffected by reset
M
WAKE
ILTY
PEN
0
0
0
0
ILIE
TE
RE
RWU
0
0
0
0
R
ORIE
NEIE
FEIE
0
0
0
0
IDLE
OR
NF
FE
0
0
0
0
R = Reserved U = Unaffected
PTAPUE0
0
PTBPUE0
0
SPTIE
0
SPR0
0
R0
T0
PTY
0
SBK
0
PEIE
0
PE
0
Figure 2-2. Control, Status, and Data Registers (Sheet 1 of 5)
MC68HC908QB8 Data Sheet, Rev. 1
Freescale Semiconductor
25