Serial Communication Interface (S12SCIV5)
Register
Name
Bit 7
6
5
4
3
2
1
Bit 0
0x0006
SCIDRH
R
R8
0
0
0
0
0
0
T8
W
0x0007
SCIDRL
R
R7
T7
R6
T6
R5
T5
R4
T4
R3
T3
R2
T2
R1
T1
R0
T0
W
1.These registers are accessible if the AMAP bit in the SCISR2 register is set to zero.
2,These registers are accessible if the AMAP bit in the SCISR2 register is set to one.
= Unimplemented or Reserved
Figure 11-2. SCI Register Summary (Sheet 2 of 2)
11.3.2.1 SCI Baud Rate Registers (SCIBDH, SCIBDL)
Module Base + 0x0000
7
6
5
4
3
2
1
0
R
W
IREN
TNP1
TNP0
SBR12
SBR11
SBR10
SBR9
0
SBR8
Reset
0
0
0
0
0
0
0
Figure 11-3. SCI Baud Rate Register (SCIBDH)
Module Base + 0x0001
7
6
5
4
3
2
1
0
R
SBR7
W
SBR6
SBR5
SBR4
SBR3
SBR2
SBR1
SBR0
Reset
0
0
0
0
0
1
0
0
Figure 11-4. SCI Baud Rate Register (SCIBDL)
Read: Anytime, if AMAP = 0. If only SCIBDH is written to, a read will not return the correct data until
SCIBDL is written to as well, following a write to SCIBDH.
Write: Anytime, if AMAP = 0.
NOTE
Those two registers are only visible in the memory map if AMAP = 0 (reset
condition).
The SCI baud rate register is used by to determine the baud rate of the SCI, and to control the infrared
modulation/demodulation submodule.
S12P-Family Reference Manual, Rev. 1.13
Freescale Semiconductor
367
FREESCALE [ Freescale ]
