BAT32G1x9 user manual | Chapter 19 Universal serial communication unit
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Rev.1.02
Table 19-2
3-wire serial I/O operating clocks
SMRmn
register
SPSm register
Running Clock (f
MCK
)
Note
CKSmn
PRS
m13
PRS
m12
PRS
m11
PRS
m10
PRS
m03
PRS
m02
PRS
m01
PRS
m00
f
CLK
=32MHz
runtime
0
X
X
X
X
0
0
0
0
f
CLK
32MHz
X
X
X
X
0
0
0
1
f
CLK
/2
16MHz
X
X
X
X
0
0
1
0
f
CLK
/2
2
8MHz
X
X
X
X
0
0
1
1
f
CLK
/2
3
4MHz
X
X
X
X
0
1
0
0
f
CLK
/2
4
2MHz
X
X
X
X
0
1
0
1
f
CLK
/2
5
1MHz
X
X
X
X
0
1
1
0
f
CLK
/2
6
500kHz
X
X
X
X
0
1
1
1
f
CLK
/2
7
250kHz
X
X
X
X
1
0
0
0
f
CLK
/2
8
125kHz
X
X
X
X
1
0
0
1
f
CLK
/2
9
62.5kHz
X
X
X
X
1
0
1
0
f
CLK
/2
10
31.25kHz
X
X
X
X
1
0
1
1
f
CLK
/2
11
15.63kHz
X
X
X
X
1
1
0
0
f
CLK
/2
12
7.81kHz
X
X
X
X
1
1
0
1
f
CLK
/2
13
3.91kHz
X
X
X
X
1
1
1
0
f
CLK
/2
14
1.95kHz
X
X
X
X
1
1
1
1
f
CLK
/2
15
977Hz
1
0
0
0
0
X
X
X
X
f
CLK
32MHz
0
0
0
1
X
X
X
X
f
CLK
/2
16MHz
0
0
1
0
X
X
X
X
f
CLK
/2
2
8MHz
0
0
1
1
X
X
X
X
f
CLK
/2
3
4MHz
0
1
0
0
X
X
X
X
f
CLK
/2
4
2MHz
0
1
0
1
X
X
X
X
f
CLK
/2
5
1MHz
0
1
1
0
X
X
X
X
f
CLK
/2
6
500kHz
0
1
1
1
X
X
X
X
f
CLK
/2
7
250kHz
1
0
0
0
X
X
X
X
f
CLK
/2
8
125kHz
1
0
0
1
X
X
X
X
f
CLK
/2
9
62.5kHz
1
0
1
0
X
X
X
X
f
CLK
/2
10
31.25kHz
1
0
1
1
X
X
X
X
f
CLK
/2
11
15.63kHz
1
1
0
0
X
X
X
X
f
CLK
/2
12
7.81kHz
1
1
0
1
X
X
X
X
f
CLK
/2
13
3.91kHz
1
1
1
0
X
X
X
X
f
CLK
/2
14
1.95kHz
1
1
1
1
X
X
X
X
f
CLK
/2
15
977Hz
NoteWhen you change the clock selected as f
CLK
(change the value of the system clock control register (CKC)), you
must stop the operation of the Universal Serial Communication Unit
(SCI)
(serial channel stop register
m
(
STm)=000FH) after making changes.
Note 1.X: Ignore
2.m:unit number(m=0~2)n:channel number(n=0~3)mn=00~03, 10~11, 20~21