HD64F2357VF13 Datasheet, PDF (558/1049 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Table 15-5 Examples of Bit Rate B (bit/s) for Various BRR Settings (When n = 0)
N
10.00 10.714 13.00
0
13441 14400 17473
1
6720
7200
8737
2
4480
4800
5824
Note: Bit rates are rounded to the nearest whole number.
ø (MHz)
14.285 16.00
19200 21505
9600
10753
6400
7168
18.00
24194
12097
8065
20.00
26882
13441
8961
The method of calculating the value to be set in the bit rate register (BRR) from the operating frequency and bit rate, on
the other hand, is shown below. N is an integer, 0 ≤ N ≤ 255, and the smaller error is specified.
N=
ø
× 10⁶ – 1
1488 × 2^2n–1 × B
Table 15-6 Examples of BRR Settings for Bit Rate B (bit/s) (When n = 0)
bit/s
9600
ø (MHz)
7.1424 10.00 10.7136 13.00 14.2848 16.00
18.00
20.00
N Error N Error N Error N Error N Error N Error N Error N Error
0 0.00 1 30 1 25 1 8.99 1 0.00 1 12.01 2 15.99 2 6.60
Table 15-7 Maximum Bit Rate at Various Frequencies (Smart Card Interface Mode)
ø (MHz)
Maximum Bit Rate (bit/s)
N
n
7.1424
9600
0
0
10.00
13441
0
0
10.7136
14400
0
0
13.00
17473
0
0
14.2848
19200
0
0
16.00
21505
0
0
18.00
24194
0
0
20.00
26882
0
0
The bit rate error is given by the following formula:
Error (%) = (
ø
1488 × 2^2n–1 × B × (N + 1)
× 10⁶ – 1) × 100
Rev.6.00 Oct.28.2004 page 528 of 1016
REJ09B0138-0600H