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AT89C51IC2-SLSCM Datasheet(PDF) 51 Page - ATMEL Corporation

Part # AT89C51IC2-SLSCM
Description  8-bit Flash Microcontroller with 2-wire Interface
PDF  146 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C51IC2-SLSCM Datasheet(HTML) 51 Page - ATMEL Corporation

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AT89C51IC2
4301A–8051–01/04
Internal Baud Rate Generator
(BRG)
When the internal Baud Rate Generator is used, the Baud Rates are determined by the
BRG overflow depending on the BRL reload value, the value of SPD bit (Speed Mode)
in BDRCON register and the value of the SMOD1 bit in PCON register.
Figure 21. Internal Baud Rate
•
The baud rate for UART is token by formula:
Peripheral clock
BRG
0
1
/6
BRL
/2
0
1
INT_BRG
BRR
auto reload counter
overflow
SPD
BaudRate
2SMOD FCLKPERIPH
×
22
6
×
×
1
SPD
–
〈〉 16
×
256
BRL
()
–
[]
×
----------------------------------------------------------------------------------------------------------
=
BRL
()
256
2SMOD1 FCLKPERIPH
×
22
6
×
×
1
SPD
–
()
16
×
BaudRate
×
-----------------------------------------------------------------------------------------
–
=



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