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STPM34 Folha de dados(PDF) 75 Page - STMicroelectronics

Nome de Peças STPM34
Descrição Electrónicos  ASSP for metering applications with up to four independent 24-bit 2nd order sigma-delta ADCs, 4 MHz OSF and 2 embedded PGLNA
PDF  121 Pages
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Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STPM34 Folha de dados(HTML) 75 Page - STMicroelectronics

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DS10272 Rev 8
75/121
STPM32, STPM33, STPM34
Theory of operation
121
Table 32 summarizes the above calculation of the register value to select some typical baud
rates:
8.6.4
UART/SPI status register and interrupt control register
At row 20, at read address 0x28, the register is responsible for holding the status of
UART/SPI peripherals of the STPM3x device. Setting the correspondent bit in IRQ CR the
interrupt mask raises an interrupt on both INT1, INT2 pins based on the peripheral status.
Table 32. Baud rate register examples
Baud rate
BRDIV
BRRI
BRRF
Register value
2400
416.666667
416 = 0x1A0
11 = 0xB
1A0B
9600
104.166667
104 = 0x68
3 = 0x3
683
19200
52.0833333
52 = 0x34
1 = 0x1
341
57600
17.3611111
17 = 0x11
6 = 0x6
116
115200
8.68055556
8 = 0x8
11 = 0xB
8B
230400
4.34027778
4 = 0x4
5 = 0x5
45
460800
2.17013889
2 = 0x2
3 = 0x3
23



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