Baud Rate Selection Register (Brsr) - Texas Instruments TMS320 Series User Manual

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Table 17. SCI Format Control Register (SCIFORMAT) Field Descriptions (continued)
Bit Field
18-16 LENGTH
15-3 Reserved
2-0 CHAR

6.12 Baud Rate Selection Register (BRSR)

The Baud Rate Selection Register (BRSR) is shown in
31
Reserved
R-0
15
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
SPRUGE2A – May 2009 – Revised June 2009
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Value Description
Frame length control bits.
In LIN mode, these bits indicate the number of bytes in the response field from 1 to 8 bytes. In
buffered SCI mode, these bits indicate the number of characters. When these bits are used to
indicate LIN response length (SCIGCR1[0] = 1), then when there is an ID RX match, this value
should be updated with the expected length of the response. In buffered SCI mode, these bits
indicate the number of characters with SCIFORMAT[2:0] bits per character. i.e. these bits indicate
the transmitter/receiver format for the number of characters: 1 to 8. There can be up to eight
characters with eight bits each.
0h The response field has 1 bytes/characters.
1h The response field has 2 bytes/characters.
2h The response field has 3 bytes/characters.
3h The response field has 4 bytes/characters.
4h The response field has 5 bytes/characters.
5h The response field has 6 bytes/characters.
6h The response field has 7 bytes/characters.
7h The response field has 8 bytes/characters.
Reads return zero and writes have no effect.
Character length control bits.
These bits are effective in SCI compatible or buffered SCI modes only. These bits set the SCI
character length from 1 to 8 bits.
Note: In compatibility mode or buffered SCI mode, when data of fewer than eight bits in length is
received, it is left justified in SCIRD/RDy and padded with trailing zeros. Data read from the SCIRD
should be shifted by software to make the received data right justified.
Note: Data written to the SCITD should be right justified but does not need to be padded with
leading zeros.
0h The character is 1 bits long.
1h The character is 2 bits long.
2h The character is 3 bits long.
3h The character is 4 bits long.
4h The character is 5 bits long.
5h The character is 6 bits long.
6h The character is 7 bits long.
7h The character is 8 bits long.
Figure 32. Baud Rate Selection Register (BRSR)
28 27
M
R/W-0
Preliminary
Figure 32 and described in
24 23
P
R/W-0
Local Interconnect Network (LIN) Module
SCI/BLIN Control Registers
Table 18.
16
P
R/W-0
0
69