CYW20735 Datasheet, PDF (11/55 Pages) Cypress Semiconductor – Single-Chip Bluetooth Transceiver for Wireless Input Devices

CYW20735
Table 2 on page 11 contains example values to generate common baud rates with a 24 MHz UART clock.
Table 2. Common Baud Rate Examples, 24 MHz Clock
Baud Rate (bps)
Baud Rate Adjustment
High Nibble
Low Nibble
Mode
3M
0xFF
0xF8
High rate
0.00
2M
0XFF
0XF4
High rate
0.00
1M
0X44
0XFF
Normal
0.00
921600
0x05
0x05
Normal
0.16
460800
0x02
0x02
Normal
0.16
230400
0x04
0x04
Normal
0.16
115200
0x00
0x00
Normal
0.16
57600
0x00
0x00
Normal
0.16
Error (%)
Table 3 contains example values to generate common baud rates with a 48 MHz UART clock.
Table 3. Common Baud Rate Examples, 48 MHz Clock
Baud Rate (bps)
6M
4M
3M
2M
1.5M
1M
921600
230400
115200
57600
High Rate
0xFF
0xFF
0x0
0x44
0x0
0x0
0x22
0x0
0x1
0x1
Low Rate
0xF8
0xF4
0xFF
0xFF
0xFE
0xFD
0xFD
0xF3
0xE6
0xCC
Mode
High rate
High rate
Normal
Normal
Normal
Normal
Normal
Normal
Normal
Normal
Error (%)
0
0
0
0
0
0
0.16
0.16
–0.08
0.04
Support for changing the baud rate during normal HCI UART operation is included through a vendor-specific command that allows
the host to adjust the contents of the baud rate registers.
The CYW20735 UART operates correctly with the host UART as long as the combined baud rate error of the two devices is within ±5%.
Document Number: 002-14881 Rev. *F
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