UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 233
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UPD784026
Manufacturer Part Number
UPD784026
Description
16/8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD784026.pdf
(759 pages)
- Current page: 233 of 759
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8.6.2 Capture Operations
in synchronization with an external trigger, and retained there.
trigger). The count value of TM0 in the process of being counted is fetched into the capture register (CR02) in synchronization
with the capture trigger, and is retained there. The contents of the CR02 are retained until the next capture trigger is generated.
are set as capture triggers, the width of pulses input from off-chip can be measured. Also, if a capture trigger is generated by
a single edge, the input pulse cycle can be measured.
Timer/counter 0 performs capture operations in which the timer register 0 (TM0) count value is fetched into the capture register
A valid edge detected from the input of the external interrupt request input pin (INTP3) is used as the external trigger (capture
The capture trigger valid edge is set by means of external interrupt mode register 1 (INTM1). If both rising and falling edges
See Figure 19-2 in CHAPTER 19 EDGE DETECTION FUNCTION for details of the INTM1.
Remark Dn: TM0 count value (n = 0, 1, 2, ...)
CLR01 = 0
Interrupt Request
Capture Register
TM0
Count Value
Pin Input
(CR02)
INTP3
INTP3
OVF0
0H
Count Start
CE0 1
Figure 8-15 Capture Operation
D0
CHAPTER 8 TIMER/COUNTER 0
D0
D1
FFFFH
D1
D2
D2
193
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