HD6412350 Hitachi, HD6412350 Datasheet - Page 627

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

14.3.5
Only an internal clock generated by the on-chip baud rate generator can be used as the
transmit/receive clock for the smart card interface. The bit rate is set with BRR and the CKS1 and
CKS0 bits in SMR. The formula for calculating the bit rate is as shown below. Table 14-5 shows
some sample bit rates.
If clock output is selected by setting CKE0 to 1, a clock with a frequency of 372 times the bit rate
is output from the SCK pin.
B =
Where: N = Value set in BRR (0 N 255)
Table 14-4 Correspondence between n and CKS1, CKS0
n
0
1
2
3
Table 14-5 Examples of Bit Rate B (bit/s) for Various BRR Settings (When n = 0)
N
0
1
2
Note: Bit rates are rounded to the nearest whole number.
B = Bit rate (bit/s)
ø = Operating frequency (MHz)
n = See table 14-4
Clock
1488
CKS1
0
1
2
2n–1
ø
10.00
13441
6720
4480
(N + 1)
CKS0
0
1
0
1
10.714
14400
7200
4800
10
6
13.00
17473
8737
5824
14.285
19200
9600
6400
ø (MHz)
16.00
21505
10753
7168
18.00
24194
12097
8065
20.00
26882
13441
8961
607