
MOTOROLA
C-4
MC68HC05B6
Rev. 4
MC68HC705B5
14
(1) This bit reflects the state of the EPP bit in the options register ($1EFE) at reset.
(2) This bit is set each time the device is powered-on.
(3) The state of the WDOG bit after reset depends on the mask option selected; ‘1’ = watchdog enabled and ‘0’ = watchdog disabled.
(4) Because this register is implemented in EPROM reset has no effect on the state of the individual bits.
Table C-1
Register outline
Register name
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State on
reset
Undefined
Undefined
Port A data (PORTA)
Port B data (PORTB)
$0000
$0001
Port C data (PORTC)
$0002
PC2/
ECLK
PD2
Undefined
Port D data (PORTD)
Port A data direction (DDRA)
Port B data direction (DDRB)
Port C data direction (DDRC)
EPROM/ECLK control
A/D data (ADDATA)
A/D status/control (ADSTAT)
Pulse length modulation A (PLMA)
Pulse length modulation B (PLMB)
Mscellaneous
SCI baud rate (BAUD)
SCI control 1 (SCCR1)
SCI control 2 (SCCR2)
SCI status (SCSR)
SCI data (SCDR)
Timer control (TCR)
Timer status (TSR)
Input capture high 1
Input capture low 1
Output compare high 1
Output compare low 1
Timer counter high
Timer counter low
Alternate counter high
Alternate counter low
Input capture high 2
Input capture low 2
Output compare high 2
Output compare low 2
Options (OPTR)
(4)
$0003
$0004
$0005
$0006
$0007
$0008
$0009 COCO ADRC ADON
$000A
$000B
$000C POR
(2)
$000D
SPC1 SPC0 SCT1 SCT0 SCT0 SCR2 SCR1 SCR0 00uu uuuu
$000E
R8
T8
M
$000F
TIE
TCIE
RIE
ILIE
$0010
TDRE
TC
RDRF
IDLE
$0011
$0012
ICIE
OCIE
TOIE FOLV2 FOLV1 OLV2 IEDG1 OLVL1 0000 00u0
$0013
ICF1
OCF1
TOF
ICF2
OCF2
$0014
$0015
$0016
$0017
$0018
$0019
$001A
$001B
$001C
$001D
$001E
$001F
$1EFE
EPP
0
RTIM RWAT WWAT PBPD PCPD Not affected
PD7
PD6
PD5
PD4
PD3
PD1
PD0
Undefined
0000 0000
0000 0000
0000 0000
u00 0uuu
0000 0000
0000 0000
0000 0000
0000 0000
(3)
001 000
EPPT
(1)
ELAT EPGM ECLK
0
CH3
CH2
CH1
CH0
INTP
INTN
INTE
SFA
SFB
SM WDOG
WAKE CPOL CPHA LBCL
TE
RE
OR
NF
uuuu
RWU
FE
SBK
0000 0000
1100 000u
0000 0000
uuuu
Undefined
Undefined
Undefined
Undefined
1111 1111
1111 1100
1111 1111
1111 1100
Undefined
Undefined
Undefined
Undefined
TPG