CHAPTER 7 8-BIT TIMER/EVENT COUNTERS 50 AND 51
Preliminary User’s Manual U16315EJ1V0UD
166
Figure 7-4. Format of Timer Clock Selection Register 51 (TCL51)
Address: FF8CH After reset: 00H R/W
Symbol
7
6
5
4
3
2
1
0
TCL51
0
0
0
0
0
TCL512
TCL511
TCL510
TCL512
TCL511
TCL510
Count clock selection
0
0
0
TI51 falling edge
0
0
1
TI51 rising edge
0
1
0
f
X
(10 MHz)
0
1
1
f
X
/2 (5 MHz)
1
0
0
f
X
/2
4
(625 kHz)
1
0
1
f
X
/2
6
(156.25 kHz)
1
1
0
f
X
/2
8
(39.06 kHz)
1
1
1
f
X
/2
12
(2.44 kHz)
Cautions 1. When rewriting TCL51 to other data, stop the timer operation beforehand.
2. Be sure to set bits 3 to 7 to 0.
Remarks 1.
f
X
: X1 input clock oscillation frequency
2.
Figures in parentheses apply to operation at f
X
= 10 MHz.