125
CHAPTER 8 8-BIT TIMER/EVENT COUNTERS 2 TM2 AND 3 TM3
Preliminary User’s Manual U14581EJ3V0UM00
Figure 8-4. Timer Clock Select Register 3 (TCL3) Format
Address: FF75H After Reset: 00H R/W
Symbol
7
6
5
4
3
2
1
0
TCL3
0
0
0
0
0
TCL32
TCL31
TCL30
TCL32
TCL31
TCL30
Count Clock Selection
0
0
0
TIO3 falling edge
0
0
1
TIO3 rising edge
0
1
0
f
X
/2
4
(523 kHz)
0
1
1
f
X
/2
6
(130 kHz)
1
0
0
f
X
/2
7
(65.4 kHz)
1
0
1
f
X
/2
8
(32.7 kHz)
1
1
0
f
X
/2
10
(8.18 kHz)
1
1
1
f
X
/2
12
(2.04 kHz)
Cautions 1. When rewriting TCL3 to other data, stop the timer operation beforehand.
2. Bits 3 to 7 must be set to 0.
Remarks 1. f
X
: Main system clock oscillation frequency
2. Figures in parentheses apply to operation with f
X
= 8.38 MHz
(2) 8-bit timer mode control registers 2, 3 (TMC2, TMC3)
TMC2 and TMC3 are registers which sets up the following five types.
<1>
8-bit counters 2 and 3 (TM2 and TM3) count operation control
<2>
8-bit counters 2 and 3 (TM2 and TM3) operation mode selection
<3>
Timer output F/F (flip flop) status setting
<4>
Active level selection in timer F/F control or PWM (free-running) mode
<5>
Timer output control
TMC2 and TMC3 are set with a 1-bit or 8-bit memory manipulation instruction.
RESET input clears these registers to 00H.
Содержание mPD780852 Series
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