AT90S8515

Manufacturer Part NumberAT90S8515
Description8-bit microcontroller with 8K bytes in-system programmable flash, 2.7-6.0V
ManufacturerATMEL Corporation
AT90S8515 datasheet
 
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Page 57/112:

BAUD Rate Generator

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BAUD Rate Generator

0841G–09/01
The baud rate generator is a frequency divider that generates baud rates according to
the following equation:
BAUD
BAUD = Baud rate
f
= Crystal Clock frequency
CK
UBRR = Contents of the UART Baud Rate register, UBRR (0 - 255)
For standard crystal frequencies, the most commonly used baud rates can be generated
by using the UBRR settings in Table 17. UBRR values that yield an actual baud rate dif-
fering less than 2% from the target baud rate are boldface in the table. However, using
baud rates that have more than 1% error is not recommended. High error ratings give
less noise immunity.
AT90S8515
f
CK
=
------------------------------------ -
16(UBRR
1)
+
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