Serial channels
ST10F276E
Table 56 and Table 57 list some possible Baud rates against the required reload values and
the resulting bit times for 40 MHz and 64 MHz CPU clock respectively. The maximum is
anyway limited to 8 Mbaud.
Table 56. Synchronous baud rate and reload values (fCPU = 40 MHz)
Baud rate
Bit time
Reload value
Reserved
---
---
0000h
0001h
0002h
0003h
0007h
0013h
00C7h
07CFh
4E1Fh
FF4Eh
Can be used only with fCPU = 32 MHz (or lower)
6.6M Baud
5M Baud
2.5M Baud
1M Baud
100K Baud
10K Baud
1K Baud
150ns
200ns
400ns
1µs
10µs
100µs
1ms
306 Baud
3.26ms
Table 57. Synchronous baud rate and reload values (fCPU = 64 MHz)
Baud rate
Bit time
Reload value
Reserved
---
---
0000h
0001h
0002h
0003h
0007h
001Fh
013Fh
0C7Fh
7CFFh
FF9Eh
Can be used only with fCPU = 32 MHz (or lower)
Can be used only with fCPU = 48 MHz (or lower)
---
8M Baud
4M Baud
1M Baud
100K Baud
10K Baud
1K Baud
489 Baud
125ns
250ns
1µs
10µs
100µs
1ms
2.04ms
98/235
Doc ID 12303 Rev 3
STMICROELECTRONICS [ ST ]
