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AT89C5132-ROTIL Folha de dados(PDF) 110 Page - ATMEL Corporation

Nome de Peças AT89C5132-ROTIL
Descrição Electrónicos  USB Microcontroller with 64K Bytes Flash Memory
PDF  181 Pages
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Fabricante Electrônico  ATMEL [ATMEL Corporation]
Página de início  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5132-ROTIL Folha de dados(HTML) 110 Page - ATMEL Corporation

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110
4173D–USB–02/06
AT89C5132
Figure 18-5. Reception Waveforms (Mode 0)
18.3.3
Baud Rate Selection
(Mode 0)
In mode 0, the baud rate can be either fixed or variable.
As shown in Figure 18-6, the selection is done using M0SRC bit in BDRCON register.
Figure 18-7 gives the baud rate calculation formulas for each baud rate source.
Figure 18-6. Baud Rate Source Selection (mode 0)
Figure 18-7. Baud Rate Formulas (Mode 0)
Write to SCON
TXD
RXD
RI
D0
D1
D2
D3
D4
D5
D6
D7
Set REN, Clear RI
0
1
M0SRC
BDRCON.0
PER
CLOCK
÷ 6
To
IBRG0
CLOCK
Serial Port
Baud_Rate=
6(1-SPD)
⋅ 16 ⋅ (256 -BRL)
F
PER
BRL= 256
-
6(1-SPD)
⋅ 16 ⋅ Baud_Rate
F
PER
a. Fixed Formula
b. Variable Formula
Baud_Rate
=
6
F
PER



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