Datasheet

Register Map
MC68HC812A4 Data Sheet, Rev. 7
Freescale Semiconductor 41
$00CE
SCI 1 Data Register High
(SC1DRH)
See page 174.
Read: R8
T8
000000
Write:
Reset: Unaffected by reset
$00CF
SCI 1 Data Register Low
(SC1DRL)
See page 174.
Read:R7R6R5R4R3R2R1R0
Write: T7 T6 T5 T4 T3 T2 T1 T0
Reset: Unaffected by reset
$00D0
SPI 0 Control Register 1
(SP0CR1)
See page 186.
Read:
SPIE SPE SWOM MSTR CPOL CPHA SSOE LSBF
Write:
Reset:00000100
$00D1
SPI 0 Control Register 2
(SP0CR2)
See page 187.
Read: 0 0 0 0
PUPS RDS
0
SPC0
Write:
Reset:00001000
$00D2
SPI Baud Rate Register
(SP0BR)
See page 188.
Read: 0 0 0 0 0
SPR2 SPR1 SPR0
Write:
Reset:00000000
$00D3
SPI Status Register
(SP0SR)
See page 189.
Read: SPIF WCOL 0 MODF 0 0 0 0
Write:
Reset:00000000
$00D4 Reserved RRRRRRRR
$00D5
SPI Data Register
(SP0DR)
See page 190.
Read:
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Write:
Reset: Unaffected by reset
$00D6
Port S Data Register
(PORTS)
See page 147.
Read:
PS7 PS6 PS5 PS4 PS3 PS2 PS1 PS0
Write:
Reset: Unaffected by reset
$00D7
Port S Data Direction
Register (DDRS)
See page 148.
Read:
DDRS7 DDRS6 DDRS5 DDRS4 DDRS3 DDRS2 DDRS1 DDRS0
Write:
Reset:00000000
$00D8 Reserved RRRRRRRR
↓↓
$00EF Reserved RRRRRRRR
$00F0
EEPROM Configuration
Register (EEMCR)
See page 74.
Read:
1 1 1 1 1 EESWAI PROTLCK EERC
Write:
Reset:11111100
$00F1
EEPROM Block Protect
Register (EEPROT)
See page 75.
Read:
1 BPROT6 BPROT5 BPROT4 BPROT3 BPROT2 BPROT1 BPROT0
Write:
Reset:11111111
Addr.Register Name Bit 7654321Bit 0
= Unimplemented
R
= Reserved U = Unaffected
Figure 2-1. Register Map (Sheet 13 of 14)