r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 880

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 15 Serial Communication Interface (SCI, IrDA)
Table 15.3 shows sample N settings in BRR in normal asynchronous mode. Table 15.4 shows the
maximum bit rate for each frequency in normal asynchronous mode. Table 15.6 shows sample N
settings in BRR in clocked synchronous mode. Table 15.8 shows sample N settings in BRR in
Smart Card interface mode. In Smart Card interface mode, S (the number of basic clock cycles in
a 1-bit transfer interval) can be selected. For details, refer to section 15.7.4, Receive Data
Sampling Timing and Reception Margin. Tables 15.5 and 15.7 show the maximum bit rates with
external clock input.
Table 15.3 BRR Settings for Various Bit Rates (Asynchronous Mode)
Bit Rate
(bit/s)
110
150
300
600
1200
2400
4800
9600
19200
31250
38400
Rev. 1.00 Sep. 19, 2008 Page 850 of 1342
REJ09B0467-0100
n
2
2
1
1
0
0
0
0
0
0

N
141
103
207
103
207
103
51
25
12
7

8
Error
(%)
0.03
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.00

n
2
2
1
1
0
0
0
0
0
0
0
Operating Frequency φ (MHz)
9.8304
N
174
127
255
127
255
127
63
31
15
9
7
Error
(%)
–0.26
0.00
0.00
0.00
0.00
0.00
0.00
0.00
0.00
–1.73
0.00
n
2
2
2
1
1
0
0
0
0
0
0
N
177
129
64
129
64
129
64
32
15
9
7
10
Error
(%)
–0.25
0.16
0.16
0.16
0.16
0.16
0.16
–1.38
1.70
0.00
1.70
n
2
2
2
1
1
0
0
0
0
0
0
N
212
155
77
155
77
155
77
38
19
11
9
12
Error
(%)
0.03
0.16
0.16
0.16
0.16
0.16
0.16
0.16
–2.40
0.00
–2.40