upd78f0114m6gb-8es Renesas Electronics Corporation., upd78f0114m6gb-8es Datasheet - Page 144

• Manufacturer Part Number: upd78f0114m6gb-8es
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(1) Pulse width measurement with free-running counter and one capture register
144
Remark 0/1: Setting 0 or 1 allows another function to be used simultaneously with pulse width measurement.
When 16-bit timer counter 00 (TM00) is operated in free-running mode, and the edge specified by prescaler mode
register 00 (PRM00) is input to the TI000 pin, the value of TM00 is taken into 16-bit timer capture/compare
register 010 (CR010) and an external interrupt request signal (INTTM010) is set.
Specify both the rising and falling edges of the TI000 pin by using bits 4 and 5 (ES000 and ES001) of PRM00.
Sampling is performed using the count clock selected by PRM00, and a capture operation is only performed
when a valid level of the TI000 pin is detected twice, thus eliminating noise with a short pulse width.
Figure 6-17. Control Register Settings for Pulse Width Measurement with Free-Running Counter
See the description of the respective control registers for details.
PRM00
TMC00
CRC00
and One Capture Register (When TI000 and CR010 Are Used)
ES101
0/1
7
0
7
0
(a) 16-bit timer mode control register 00 (TMC00)
(b) Capture/compare control register 00 (CRC00)
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
ES100
0/1
6
0
6
0
(c) Prescaler mode register 00 (PRM00)
ES001
5
0
5
0
1
User’s Manual U16227EJ3V0UD
ES000
4
0
4
0
1
TMC003
0
3
0
3
0
TMC002
CRC002
1
1
2
0
TMC001
CRC001
PRM001
0/1
0/1
0/1
OVF00
CRC000
PRM000
0/1
0
0
Free-running mode
CR000 used as compare register
CR010 used as capture register
Selects count clock (setting “11” is prohibited).
Specifies both edges for pulse width detection.
Setting invalid (setting “10” is prohibited.)