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HD64F2329BVTE25V Datasheet, PDF (488/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents | |||
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Section 12 Serial Communication Interface (SCI)
The BRR setting is found from the following formulas.
Asynchronous mode:
N=
Ï
à 106 â 1
64 Ã 22nâ1 Ã B
Synchronous mode:
N=
Ï
à 106 â 1
8 Ã 22nâ1 Ã B
Where B: Bit rate (bits/s)
N: BRR setting for baud rate generator (0 ⤠N ⤠255)
Ï: Operating frequency (MHz)
n: Baud rate generator input clock (n = 0 to 3)
(See the table below for the relation between n and the clock.)
SMR Setting
n
Clock
CKS1
CKS0
0
Ï
0
0
1
Ï/4
0
1
2
Ï/16
1
0
3
Ï/64
1
1
The bit rate error in asynchronous mode is found from the following formula:
Ï Ã 106
Error (%) = {
â 1} Ã 100
(N + 1) Ã B Ã 64 Ã 22nâ1
Rev.7.00 Feb. 14, 2007 page 454 of 1108
REJ09B0089-0700
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