UPD78F9234MC-5A4-A Datasheet, PDF (113/419 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
Figure 6-25. Control Register Settings for Pulse Width Measurement by Means of Restart
(with Rising Edge Specified)
(a) Capture/compare control register 00 (CRC00)
7
6
5
4
3 CRC002 CRC001 CRC000
CRC00 0
0
0
0
0
1
1
1
CR000 used as capture register
Captures to CR000 at inverse edge to valid edge of TI000^Note.
CR010 used as capture register
(b) Prescaler mode register 00 (PRM00)
ES110 ES100 ES010 ES000 3
PRM00 0/1 0/1 0
1
0
2 PRM001 PRM000
0 0/1 0/1
Selects count clock (setting “11” is prohibited).
Specifies rising edge for pulse width detection.
Setting invalid (setting “10” is prohibited.)
(c) 16-bit timer mode control register 00 (TMC00)
7
6
5
4 TMC003 TMC002 TMC001 OVF00
TMC00 0
0
0
0
1
0 0/1 0
Clears and starts at valid edge of TI000 pin.
Note If the valid edge of the TI000 pin is specified to be both the rising and falling edges, 16-bit timer
capture/compare register 000 (CR000) cannot perform the capture operation.
Figure 6-26. Timing of Pulse Width Measurement Operation by Means of Restart
(with Rising Edge Specified)
t
Count clock
TM00 count value
TI000 pin input
CR010 capture value
CR000 capture value
INTTM010
0000H 0001H
D0 0000H 0001H D1
D2 0000H 0001H
D0
D2
D1
(D1 + 1) × t
(D2 + 1) × t
User’s Manual U17446EJ5V0UD
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