
157
CHAPTER 8 APPLICATIONS OF SERIAL INTERFACE
Figure 8-2. Format of Timer Clock Select Register 3 (
μ
PD78002Y subseries)
TCL33
TCL32 TCL31
TCL30
Selects serial clock of serial interface channel 0
0
1
1
0
f
X
/2
6
(156 kHz)
f
X
/2
2
Note
0
1
1
1
f
X
/2
7
(78.1 kHz)
f
X
/2
3
(1.25 MHz)
1
0
0
0
f
X
/2
8
(39.1 kHz)
f
X
/2
4
(625 kHz)
1
0
0
1
f
X
/2
9
(19.5 kHz)
f
X
/2
5
(313 kHz)
1
0
1
0
f
X
/2
10
(9.8 kHz)
f
X
/2
6
(156 kHz)
1
0
1
1
f
X
/2
11
(4.9 kHz)
f
X
/2
7
(78.1 kHz)
1
1
0
0
f
X
/2
12
(2.4 kHz)
f
X
/2
8
(39.1 kHz)
1
1
0
1
f
X
/2
13
(1.2 kHz)
f
X
/2
9
(19.5 kHz)
Others
Setting prohibited
Note
Can be set only when the main system clock frequency is 4.19 MHz or less.
Cautions 1. Be sure to set bit 7 to 1, and bits 6 through 4 to 0.
2. Before writing new data to TCL3, stop serial transfer once.
Remarks 1.
f
X
: main system clock oscillation frequency
2.
( ) : at f
X
= 10.0 MHz
Serial clock in 3-wire serial I/O/SBI/2-wire
serial I/O mode
Serial clock in I
2
C bus mode
7
6
5
4
3
2
Symbol
1
0
FF43H
TCL30
TCL3
TCL31
TCL33 TCL32
0
0
0
1
Address
At reset
R/W
88H
R/W