Datasheet

Register Map
MC68HC812A4 Data Sheet, Rev. 7
Freescale Semiconductor 153
14.4 Register Map
NOTE
The register block can be mapped to any 2-Kbyte boundary within the
standard 64-Kbyte address space. The register block occupies the first 512
bytes of the 2-Kbyte block. This register map shows default addressing
after reset.
Addr.Register Name Bit 7654321Bit 0
$00C0
SCI 0 Baud Rate Register
High (SC0BDH)
See page 168.
Read:
BTST BSPL BRLD SBR12 SBR11 SBR10 SBR9 SBR8
Write:
Reset:00000000
$00C1
SCI 0 Baud Rate Register
Low (SC0BDL)
See page 168.
Read:
SBR7 SBR6 SBR5 SBR4 SBR3 SBR2 SBR1 SBR0
Write:
Reset:00000100
$00C2
SCI 0 Control
Register 1 (SC0CR1)
See page 169.
Read:
LOOPS WOMS RSRC M WAKE ILT PE PT
Write:
Reset:00000000
$00C3
SCI 0 Control
Register 2 (SC0CR2)
See page 171.
Read:
TIE TCIE RIE ILIE TE RE RWU SBK
Write:
Reset:00000000
$00C4
SCI 0 Status
Register 1 (SC0SR1)
See page 172.
Read: TDRE TC RDRF IDLE OR NF FE PF
Write:
Reset:11000000
$00C5
SCI 0 Status
Register 2 (SC0SR2)
See page 173.
Read:0000000RAF
Write:
Reset:00000000
$00C6
SCI 0 Data Register High
(SC0DRH)
See page 174.
Read: R8
T8
000000
Write:
Reset: Unaffected by reset
$00C7
SCI 0 Data Register Low
(SC0DRL)
See page 174.
Read:R7R6R5R4R3R2R1R0
Write: T7 T6 T5 T4 T3 T2 T1 T0
Reset: Unaffected by reset
$00C8
SCI 1 Baud Rate Register
High (SC1BDH)
See page 168.
Read:
BTST BSPL BRLD SBR12 SBR11 SBR10 SBR9 SBR8
Write:
Reset:00000000
= Unimplemented
Figure 14-2. SCI Register Map