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10.11 Setting Examples of Baud Rates and U-TIMER Reload Values
10.11 Setting Examples of Baud Rates and U-TIMER Reload
Values
Tables 10.11-1 and 10.11-2 are sample settings for baud rates and U-TIMER reload
values.
The frequencies in the tables indicate peripheral machine clock frequencies. UCC1
indicates the value to set in the UCC1 bit of the U-TIMER control register (UTIMC).
A hyphen "-" in the tables indicate that the corresponding value cannot be used
because the error exceeds plus or minus 1%.
■
Sample Settings for Baud Rates and U-TIMER Reload Values
❍
Asynchronous (start-stop) mode
❍
CLK synchronous mode
*1: The error exceeds plus or minus 1%.
Table 10.11-1 Baud Rates and U-TIMER Reload Values in Asynchronous (Start-Stop) Mode
Baud rate
µ
µµ
µ
s 25 MHz 20 MHz 12.5 MHz 10 MHz
1200 833.33 650 (UCC1=0) 520 (UCC1=0) 324 (UCC1=1) 259 (UCC1=1)
2400 416.67 324 (UCC1=1) 259 (UCC1=1) 162 (UCC1=0) 129 (UCC1=0)
4800 208.33 162 (UCC1=0) 129 (UCC1=0) 80 (UCC1=1) 64 (UCC1=0)
9600 104.17 80 (UCC1=1) 64 (UCC1=0) 39 (UCC1=1) 31 (UCC1=1)
19200 52.08 39 (UCC1=1) 31 (UCC1=1) 19 (UCC1=1) -
38400 26.04 19 (UCC1=1) - 12 (UCC1=1) -
57600 17.36 12 (UCC1=1) - - -
10400 96.15 74 (UCC1=0) 59 (UCC1=0) 36 (UCC1=1) 29 (UCC1=0)
31250 32.00 24 (UCC1=0) 19 (UCC1=0) 11 (UCC1=1) 9 (UCC1=0)
62500 16.00 11 (UCC1=1) 9 (UCC1=0) - 4 (UCC1=0)
Table 10.11-2 Baud Rates and U-TIMER Reload Values in CLK Synchronous Mode
Baud rate
µ
µµ
µ
s 25 MHz 20 MHz 12.5 MHz 10 MHz
250 K 4.00 49 (UCC1=0) 39 (UCC1=0) 24 (UCC1=0) 19 (UCC1=0)
500 K 2.00 24 (UCC1=0) 19 (UCC1=0) 11 (UCC1=1) 9 (UCC1=0)
1 M 1.00 11 (UCC1=1) 9 (UCC1=0) 5 (UCC1=0)*
1
4 (UCC1=0)