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Rev. 5.00, 09/03, page 499 of 760
Table 15.4 Relationship of n to CKS1 and CKS0
n CKS1 CKS0
000
101
210
311
Table 15.5 Examples of Bit Rate B (Bits/s) for SCBRR Settings (n =
==
= 0)
P
φ
φφ
φ
(MHz)
N 7.1424 10.00 10.7136 13.00 14.2848 16.00 18.00
0 9600.0 13440.9 14400.0 17473.1 19200.0 21505.4 24193.5
1 4800.0 6720.4 7200.0 8736.6 9600.0 10752.7 12096.8
2 3200.0 4480.3 4800.0 5824.4 6400.0 7168.5 8064.5
Note: The bit rate is rounded to one decimal place.
Calculate the value to be set in the bit rate register (SCBRR) from the operating frequency and the
bit rate. N is an integer in the range 0 ≤ N ≤ 255, specifying a smallish error.
N = × 10
6
− 1
1488 × 2
2n−1
× B
Pφ
Table 15.6 Examples of SCBRR Settings for Bit Rate B (Bits/s) (n =
==
= 0)
φ
φφ
φ
(MHz) (9600 Bits/s)
7.1424 10.00 10.7136 13.00 14.2848 16.00 18.00
N Error N Error N Error N Error N Error N Error N Error
0 0.00 1 30.00 1 25.00 1 8.99 1 0.00 1 12.01 2 15.99