ST10F269-T3 STMicroelectronics, ST10F269-T3 Datasheet - Page 92

• Manufacturer Part Number: ST10F269-T3
• Manufacturer: STMicroelectronics

Specifications of ST10F269-T3

• Cpu Family: ST10
• Device Core Size: 16b
• Frequency (max): 32MHz
• Interface Type: ASC/I2C/SSC
• Program Memory Type: Flash
• Program Memory Size: 256KB
• Total Internal Ram Size: 12KB
• # I/os (max): 111
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 16-chx10-bit
• Instruction Set Architecture: CISC/RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 144
• Package Type: TQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

ST10F269-T3
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 operation of serial channel ASC0 and the required reload value for a given Baud
rate can be determined by the following formulas:
(S0BRL) represents the content of the reload register, taken as unsigned 13-bit integer,
(S0BRS) represents the value of bit S0BRS (‘0’ or ‘1’), taken as integer.
Using the above equation, the maximum Baud rate can be calculated for any given clock speed. Baud
rate versus reload register value (SOBRS=0 and SOBRS=1) is described in Table 23.
Table 23 : Commonly Used Baud Rates by Reload Value and Deviation Errors
Note: The deviation errors given in the Table 23 are rounded. To avoid deviation errors use a Baud rate
92/162
Baud Rate (Baud)
B
S0BRL = (
Async
1000 000
56000
38400
19200
crystal (providing a multiple of the ASC0/SSC sampling frequency).
9600
4800
2400
1200
600
95
=
16 x [2 + (S0BRS)] x [(S0BRL) + 1]
S0BRS = ‘0’, f
16 x [2 + (S0BRS)] x B
Deviation Error
+5.0% / -0.8%
+0.2% / -3.5%
+0.2% / -1.7%
+0.2% / -0.8%
+0.5% / -0.3%
+0.2% / -0.1%
+0.1% / -0.1%
+0.1% / -0.1%
+0.1% / -0.1%
±0.0%
f
CPU
CPU
f
CPU
= 32MHz
00CFh / 00CEh
291Dh / 291Eh
019Fh / 01A0h
Async
0019h / 0020h
0033h / 0034h
0340h / 0341h
0681h / 0682h
Reload Value
0067h/ 0068h
0010h / 001h
0000h
) - 1
Baud Rate (Baud)
666 667
56000
38400
19200
9600
4800
2400
1200
600
75
63
S0BRS = ‘1’, f
Deviation Error
+8.2% / -0.8%
+2.1% / -3.5%
+2.1% / -0.8%
+0.6% / -0.8%
+0.6% / -0.1%
+0.3% / -0.1%
+0.1% / -0.1%
+0.1% / -0.1%
+0.1% / -0.1%
+0.1% / 0.1%
±0.0%
CPU
= 32MHz
000Ah / 000Bh
022Ah / 022Bh
22B7h / 22B8h
0089h / 008Ah
0010h / 0011h
0021h / 0022h
0044h / 0045h
0114h / 0115h
0456h / 0457h
2955h / 2956h
Reload Value
0000h