MMCCMB2107 Freescale, MMCCMB2107 Datasheet - Page 336

• Manufacturer Part Number: MMCCMB2107
• Manufacturer: Freescale

Specifications of MMCCMB2107

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Serial Communications Interface Modules (SCI1 and SCI2)
16.7.1 SCI Baud Rate Registers
Technical Data
336
NOTE:
Address: SCI1 — 0x00cc_0000
Address: SCI1 — 0x00cc_0001
Serial Communications Interface Modules (SCI1 and SCI2)
Reset:
Reset:
Read: Anytime
Write: Anytime
SBR[12:8], SBR[7:0] — SCI Baud Rate Bits
The baud rate generator is disabled until the TE bit or the RE bit in
SCICR2 is set for the first time after reset. The baud rate generator is
disabled when SBR[12:0] = 0.
Writing to SCIBDH has no effect without also writing to SCIBDL. Writing
to SCIBDH puts the data in a temporary location until data is written to
SCIBDL.
Read:
Read:
Write:
Write:
These read/write bits control the SCI baud rate:
where:
Freescale Semiconductor, Inc.
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1
SCI2 — 0x00cd_0000
SCI2 — 0x00cd_0001
Figure 16-2. SCI Baud Rate Register High (SCIBDH)
Figure 16-3. SCI Baud Rate Register Low (SCIBDL)
SBR7
Bit 7
Bit 7
0
0
0
SBR[12:0]
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= Writes have no effect and the access terminates without a transfer error exception.
SCI baud rate =
SBR6
6
0
0
6
0
8191
SBR5
5
0
0
5
0
16 x SBR[12:0]
SBR12
SBR4
4
0
4
0
f
sys
SBR11
SBR3
3
0
3
0
SBR10
SBR2
2
0
2
1
MMC2107 – Rev. 2.0
SBR9
SBR1
1
0
1
0
MOTOROLA
SBR8
SBR0
Bit 0
Bit 0
0
0