643
Chapter 15
Asynchronous Serial Interface C (UARTC)
User’s Manual U16580EE3V1UD00
Therefore, the maximum baud rate that can be received by the destination is as follows.
Similarly, obtaining the following maximum allowable transfer rate yields the following.
Therefore, the minimum baud rate that can be received by the destination is as follows.
Obtaining the allowable baud rate error for UARTCn and the destination from the above-described
equations for obtaining the minimum and maximum baud rate values yields the following.
Remarks: 1.
The reception accuracy depends on the bit count in 1 frame, the input clock frequency,
and the division ratio (k). The higher the input clock frequency and the larger the
division ratio (k), the higher the accuracy is.
2.
k: UCnCTL2 setting value (n = 0, 1)
Table 15-5:
Maximum/Minimum Allowable Baud Rate Error
Divide Ratio (k)
Maximum Allowable Baud Rate Error
Minimum Allowable Baud Rate Error
8
+3.53%
-3.61%
20
+4.26%
-4.31%
50
+4.56%
-4.58%
100
+4.66%
-4.67%
255
+4.72%
-4.73%
BRmax = (FLmin/11)
-1
= BR
21k + 2
22k
×
FLmax = 11
×
FL -
×
FL = FL
10
11
k + 2
2
×
k
21k - 2
2
×
k
FLmax = FL
×
11
21k - 2
20k
BRmin = (FLmax/11)
-1
= BR
21k - 2
20k
Содержание V850E/PH2
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Страница 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO...
Страница 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO...
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