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ST10F296 Datasheet(PDF) 184 Page - STMicroelectronics

Part # ST10F296
Description  High performance 16-bit CPU with DSP functions
PDF  346 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST10F296 Datasheet(HTML) 184 Page - STMicroelectronics

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Serial channels
ST10F296E
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Figure 64.
Asynchronous mode of serial channel ASC0
15.1.2
Asynchronous mode baud rates
For asynchronous operation, the baud rate generator provides a clock with 16 times the rate
of the established baud rate. Every received bit is sampled at the 7th, 8th and 9th cycle of
this clock. The baud rate for asynchronous operations of serial channel ASC0 and the
required reload value for a given baud rate can be determined by the following formulae:
(S0BRL) represents the content of the reload register, taken as an unsigned 13-bit integer.
(S0BRS) represents the value of the S0BRS bit (0 or 1), taken as an integer.
Using the above equations, the maximum baud rate can be calculated for any given clock
speed. Baud rate versus the reload register value (for both S0BRS = 0 and S0BRS = 1) is
described in Table 118 and Table 119 for a CPU clock frequency equal to 40 MHz and 64
MHz respectively.
Pin
2
CPU
clock
S0R
Baud rate timer
Reload register
16
Clock
Serial port control
Shift clock
S0M S0STP
S0FE
S0OE
S0PE
S0REN
S0FEN
S0PEN
S0OEN
S0LB
S0RIR
S0TIR
S0EIR
Receive interrupt
request
Transmit interrupt
request
Error interrupt
request
Transmit shift
register
Receive shift
register
TxD0
Transmit buffer
register S0TBUF
Receive buffer
register S0RBUF
Sampling
MUX
0
1
Pin
Input
Internal bus
RxD0
output
B
Async
f
CPU
16
2
S0BRS
()
+
[]
S0BRL
() 1
+
[]
×
×
⁄
=
S0BRL
f
CPU
16
2
S0BRS
()
+
[]
×
⁄
B
Async
×
() 1
–
=
Obsolete
Product(s)
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Product(s)



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