st10f273m STMicroelectronics, st10f273m Datasheet - Page 73

• Manufacturer Part Number: st10f273m
• Description: 16-bit Mcu With 512 Kbyte Flash Memory And 36 Kbyte Ram
• Manufacturer: STMicroelectronics

ST10F273M
15
15.1
15.2
Table 38.
Note:
Baudrate (baud)
1 250 000
112 000
56 000
38 400
19 200
9 600
4 800
2 400
1 200
600
300
153
Serial channels
Serial communication with other microcontrollers, microprocessors, terminals or external
peripheral components is provided by up to four serial interfaces: two asynchronous /
synchronous serial channels (ASC0 and ASC1) and two high-speed synchronous serial
channel (SSC0 and SSC1). Dedicated baudrate generators set up all standard baudrates
without the requirement of oscillator tuning. For transmission, reception and erroneous
reception, separate interrupt vectors are provided for ASC0 and SSC0 serial channel. A
more complex mechanism of interrupt sources multiplexing is implemented for ASC1 and
SSC1 (XBUS mapped).
Asynchronous / synchronous serial interfaces
The asynchronous / synchronous serial interfaces (ASC0 and ASC1) provides serial
communication between the ST10F273M and other microcontrollers, microprocessors or
external peripherals.
ASCx in asynchronous mode
In asynchronous mode, 8- or 9-bit data transfer, parity generation and the number of stop
bits can be selected. Parity framing and overrun error detection is provided to increase the
reliability of data transfers. Transmission and reception of data is double-buffered. Full-
duplex communication up to 1.25 Mbaud (at 40 MHz of f
ASC asynchronous baudrates by reload value and deviation errors
The deviation errors given in the
baudrate crystal (providing a multiple of the ASC0 sampling frequency).
S0BRS = ‘0’, f
Deviation error
+1.5% / -7.0%
+1.5% / -3.0%
+1.7% / -1.4%
+0.2% / -1.4%
+0.2% / -0.6%
+0.2% / -0.2%
+0.2% / 0.0%
0.0% / 0.0%
0.1% / 0.0%
0.0% / 0.0%
0.0% / 0.0%
0.0% / 0.0%
CPU
= 40 MHz
Reload value
1FE8 / 1FE9
000A / 000B
0000 / 0000
0015 / 0016
001F / 0020
0040 / 0041
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
833 333
112 000
56 000
38 400
19 200
9 600
4 800
2 400
1 200
102
600
300
S0BRS = ‘1’, f
CPU
Deviation error
) is supported in this mode.
+6.3% / -7.0%
+6.3% / -0.8%
+3.3% / -1.4%
+0.9% / -1.4%
+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%
CPU
= 40 MHz
Serial channels
Reload value
00AC / 00AD
0AD8 / 0AD9
000D / 000E
1FE8 / 1FE9
002A / 002B
015A / 015B
02B5 / 02B6
056B / 056C
0000 / 0000
0006 / 0007
0014 / 0015
0055 / 0056
(hex)
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