Texas Instruments C28 Series Student Guide

Serial Communications Interface (SCI)
Asynchronous Communication Format
Start Bit
LSB of Data
Majority
Vote
Falling Edge Detected
•
Start bit valid if 4 consecutive SCICLK periods of zero bits after falling edge
• Majority vote taken on 4th, 5th, and 6th SCICLK cycles
SCIRXD
SCICLK
(Internal)
123456781234567812
Note: 8 SCICLK periods per data bit
SCI-A Baud Rate
BAUD15
(MSB)
BAUD14
Baud-Select MSbyte Register (SCIHBAUD) – 0x007052
76543210
BAUD13 BAUD12 BAUD11 BAUD10 BAUD9 BAUD8
BAUD6
Baud-Select LSbyte Register (SCILBAUD) – 0x007053
76543210
BAUD5 BAUD4 BAUD3 BAUD2 BAUD1BAUD7
BAUD0
(LSB)
SCI baud rate =
LSPCLK
(BRR + 1) x 8
LSPCLK
16
, BRR = 1 to 65535
,BRR = 0
[SCI-B Baud-Select MSbyte Register (SCIHBAUD) – 0x007752]
[SCI-B Baud-Select LSbyte Register (SCILBAUD) – 0x007753]
C28x - Communications 11 - 13

Texas Instruments C28 Series Specifications

General

Brand	Texas Instruments
Model	C28 Series
Category	Computer Hardware
Language	English