TC3567CFSG-002

2018-04-06

21

4.3.5.

Baud rate

UART baud rate of TC3567C is generated from 26 MHz clock. It is calculated from the number of oversampling and the division

ratio as follows; The oversampling number can be set between 12 and 17. The division ratio can be set between 1 and 65535.

Table 4-2 shows the actual baud rate values that can be set for the TC3567C. The TC3567C can receive data with an error of up to

±2% of the actual baud rate. Set the baud rate of the host CPU within this range.

Table 4-2 Typical UART baud rate configuration

Ideal baud rate

[bps]

Actual baud rate

[bps]

Oversampling

number

Division ratio

9600

9587.021

12

226

14400

14396.46

14

129

19200

19174.04

12

113

28800

28856.83

17

53

38400

38461.54

13

52

57600

57777.78

15

30

76800

76923.08

13

26

115200

115555.6

15

15

153600

153846.15

13

13

230400

232142.9

16

7

307200

305882.4

17

5

460800

464285.7

14

4

921600

928571.4

14

2

4.3.6.

TX message spacing function

TC3567C spaces more than 12 time frames between different TX messages making less than 12 time frames between TX frames

in a TX message when several TX frames belong to one TX message. Host CPU is able to know the boundaries between TX

messages by measuring time frames between TX frames.

Figure 4-8 TX frames and TX messages

UART TX data

UART TX massage

UART TX message

< 12 time frames

< 12 time frames

< 12 time frames

> 12 time frames

1 time frame