TC35680FSG datasheet(45/91 Pages) TOSHIBA

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TC35680FSG-002/TC35681FSG-002

2019-04-04

Baud Rate Setting

(1)

Setting by an HCI command (HCI mode)

The HCI command “HCI_M2_BTL_SET_BAUDRATE” can set the baud rate. For the details, refer to the “Command Document”.

The baud rate can be set by the following command.

Extended HCI command: HCI_M2_BTL_SET_BAUDRATE

(2)

Setting by API (only UART1) (User-App mode)

The baud rate of UART1 in TC35680/TC35681 can be set by the API “uart1_Set_BaudRate()”. The current baud rate can be

checked by the API “uart1_Read_BaudRate()”.

For details, refer to the “Programming Guide”.

(3)

Setting by a register (User-App mode)

The UART clock in TC35680/TC35681 is generated by the reference clock (32 MHz). The baud rate can be set by the UARTx_IBRD

The typical values of actual and ideal baud rates in TC35680/TC35681, and the error values are shown in Table 4-7.

TC35680/TC35681 can receive the data of which baud rate error is within ±2%. The baud rate error of the host CPU should be in

the range.

Table 4-7 Typical UART baud rate

Ideal baud rate

[bps]

Actual baud rate

[bps]

UARTx_IBRD

UARTx_FBRD

UARTx_OVCR

Error [%]

600

600.01

0x115c

—

0x25

0.01

1200

1200.12

0x08ae

—

0x25

0.01

2400

2400.24

0x0457

—

0x25

0.01

4800

4801.92

0x01dc

—

0x37

0.04

7200

7207.21

0x0172

—

0x25

0.1

9600

9603.84

0x00ee

—

0x37

0.0400

14400

14414.41

0x00b9

—

0x25

0.1001

19200

19207.68

0x0077

—

0x37

0.0400

28800

28828.83

0x004a

—

0x48

0.1001

38400

38415.37

0x0031

—

0x5a

0.0400

57600

57657.66

0x0025

—

0x48

0.1001

76800

76923.08

0x0020

—

0x36

0.1603

115200

115211.52

0x0011

0x17

0x49

0.0100

153600

153615.36

0x0011

0x17

0x25

0.0100

230400

230319.39

0x000b

0x25

-0.0350

307200

306954.44

0x0008

0x2c

0x25

-0.0799

460800

460638.78

0x0005

0x16

0x36

-0.0350

921600

920863.31

0x0002

0x0b

0x49

-0.0799

1843200

1845045.05

0x0001

0x0a

0x48

0.1001

2000000

0x0001

—

0x49

0.0000

Note: x = 1 means UART1 and x = 2 means UART2

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