Sci Baud-Select Registers (Scihbaud, Scilbaud); Baud-Select Msbyte Register (Scihbaud) - Address 7052H; Baud-Select Lsbyte Register (Scilbaud) - Address 7053H; Baud-Select Register Field Descriptions - Texas Instruments Concerto F28M35 Series Technical Reference Manual

SCI Registers

13.3.4 SCI Baud-Select Registers (SCIHBAUD, SCILBAUD)

The values in SCIHBAUD and SCILBAUD specify the baud rate for the SCI.
Figure 13-14. Baud-Select MSbyte Register (SCIHBAUD) — Address 7052h
15 14
BAUD15 (MSB) BAUD14
R/W-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Figure 13-15. Baud-Select LSbyte Register (SCILBAUD) — Address 7053h
7 6
BAUD7 BAUD6
R/W-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Bit Field
15-0 BAUD15− BAUD0
998
C28 Serial Communications Interface (SCI)
13 12
BAUD13 BAUD12
R/W-0 R/W-0
5 4
BAUD5 BAUD4
R/W-0 R/W-0
Table 13-11. Baud-Select Register Field Descriptions
Value Description
SCI 16-bit baud selection Registers SCIHBAUD (MSbyte) and SCILBAUD (LSbyte) are
concatenated to form a 16-bit baud value, BRR.
The internally-generated serial clock is determined by the low speed peripheral clock (LSPCLK)
signal and the two baud-select registers. The SCI uses the 16-bit value of these registers to select
one of 64K serial clock rates for the communication modes.
The SCI baud rate is calculated using the following equation:
SCI Asynchronous Baud
Alternatively,
=
BRR
SCI Asynchronous Baud
Note that the above formulas are applicable only when 1 ≤ BRR ≤ 65535. If BRR = 0, then
SCI Asynchronous Baud
Where: BRR = the 16-bit value (in decimal) in the baud-select registers.
Copyright © 2012–2019, Texas Instruments Incorporated
11
BAUD11 BAUD10
R/W-0 R/W-0
3
BAUD3 BAUD2
R/W-0 R/W-0
LSPCLK
=
×
+
(BRR 1) 8
LSPCLK
−
1
×
8
LSPCLK
=
16
SPRUH22I – April 2012 – Revised November 2019
10 9
BAUD9
R/W-0
2 1
BAUD1 BAUD10 (LSB)
R/W-0
Submit Documentation Feedback
www.ti.com
8
BAUD8
R/W-0
0
R/W-0
(8)
(9)
(10)