ST10F272M-4Q3 STMICROELECTRONICS [STMicroelectronics], ST10F272M-4Q3 Datasheet - Page 69

• Manufacturer Part Number: ST10F272M-4Q3
• Description: 16-bit MCU with 256 Kbyte Flash memory and 20 Kbyte RAM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST10F272M
15.3
Table 38.
Note:
15.4
Baudrate (baud)
5 000 000
112 000
56 000
38 400
19 200
9 600
4 800
2 400
1 200
900
612
ASCx in synchronous mode
In synchronous mode, data is transmitted or received synchronously to a shift clock which is
generated by the ST10F272M. Half-duplex communication up to 5 Mbaud (at 40 MHz of
f
ASC synchronous baudrates by reload value and deviation errors (f
The deviation errors given in the
baudrate crystal (providing a multiple of the ASC0 sampling frequency).
High speed synchronous serial interfaces
The High-Speed Synchronous Serial Interfaces (SSC0 and SSC1) provides flexible high-
speed serial communication between the ST10F272M and other microcontrollers,
microprocessors or external peripherals.
The SSCx supports full-duplex and half-duplex synchronous communication. The serial
clock signal can be generated by the SSCx itself (master mode) or be received from an
external master (slave mode). Data width, shift direction, clock polarity and phase are
programmable.
This allows communication with SPI-compatible devices. Transmission and reception of data
is double-buffered. A 16-bit baudrate generator provides the SSCx with a separate serial
clock signal. The serial channel SSCx has its own dedicated 16-bit baudrate generator with
16-bit reload capability, allowing baudrate generation independent from the timers.
Table 39
bit times for the 40 MHz CPU clock. The maximum is limited to 8 Mbaud.
S0BRS = ‘0’, f
CPU
) is possible in this mode.
Deviation error
+1.5% / -0.8%
+0.3% / -0.8%
+0.2% / -0.6%
+0.2% / -0.2%
+0.2% / 0.0%
+0.1% / 0.0%
0.0% / 0.0%
0.0% / 0.0%
0.0% / 0.0%
0.0% / 0.0%
0.0% / 0.0%
lists some possible baudrates against the required reload values and the resulting
CPU
= 40 MHz
Reload value
002B / 002C
1FE8 / 1FE9
15B2 / 15B3
0000 / 0000
0058 / 0059
0081 / 0082
0103 / 0104
0207 / 0208
0410 / 0411
0822 / 0823
1045 / 1046
(hex)
Table 38
Baudrate (baud)
are rounded off. To avoid deviation errors use a
3 333 333
112 000
56 000
38 400
19 200
9 600
4 800
2 400
1 200
600
407
S0BRS = ‘1’, f
Deviation error
+2.6% / -0.8%
+0.9% / -0.8%
+0.9% / -0.2%
+0.4% / -0.2%
+0.1% / -0.2%
+0.1% / -0.1%
+0.1% / 0.0%
0.0% / 0.0%
0.0% / 0.0%
0.0% / 0.0%
0.0% / 0.0%
CPU
= 40 MHz
CPU
Serial channels
Reload value
= 40 MHz)
00AC / 00AD
0AD8 / 0AD9
1FFD / 1FFE
001C / 001D
056B / 056C
003A / 003B
015A / 015B
02B5 / 02B6
15B2 / 15B3
0000 / 0000
0055 / 0056
(hex)
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