AT83C5134 Datasheet, PDF (54/171 Pages) ATMEL Corporation – 8-bit Microcontroller with Full Speed USB Device

Figure 29. Internal Baud Rate
Peripheral Clock
BRR
auto reload counter
/2
/6
0
1
overflow
BRG
0
INT_BRG
1
SPD
BRL
SMOD1
• The baud rate for UART is token by formula:
Baud_Rate =
2^SMOD1 x FCLK PERIPH
2 x 6^(1-SPD) x 16 x [256 - (BRL)]
(BRL) = 256 -
2^SMOD1 x FCLK PERIPH
2 x 6^(1-SPD) x 16 x Baud_Rate
54 AT83C5134/35/36
7683B–USB–03/07