upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 473
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upd70f3422gj-gae-qs-ax
Manufacturer Part Number
upd70f3422gj-gae-qs-ax
Description
32-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD70F3422GJ-GAE-QS-AX.pdf
(930 pages)
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16-bit Multi-Purpose Timer G (TMG)
<Timing chart for performing e dge de tection>
<Timing chart for nois e el imination>
TMGn0/TMGn1
TMGn0/TMGn1
Figure 13-20
INTTGnCCy
INTTGnCCy
f
f
COUNTx
COUNTx
GCCny
GCCny
TIGny
TIGny
13.9 Edge Noise Elimination
The edge detection circuit has a noise elimination function. This function
regards:
• a pulse not wider than 1 count clock period as a noise, and does not
• a pulse not shorter than 2 count clock periods is detected normally as an
• a pulse wider than 1 count clock period but shorter than 2 count clock
(This is because the count-up signal of the counter is used for sampling
timing.) The upper figure below shows the timing chart for performing edge
detection. The lower figure below shows the timing chart for not performing
edge detection.
Basic settings (x = 0, 1 and y = 0 to 5):
Timing of edge detection noise elimination
Preliminary User’s Manual U17566EE1V2UM00
detect it as an edge.
edge.
periods may be detected as an edge or may be eliminated as noise,
depending on the timing.
t
t
IEGny1
IEGny0
CSEx2
CSEx1
CSEx0
Bit
t+1
t+1
t+2
t+2
t+3
t+3
Value
0
1
0
1
1
t+4
t+4
Remark
Count clock =
detection of both edges
t+5
t+5
t+4
t+6
t+6
f
SPCLK0
/4
t+7
t+7
Chapter 13
t+6
473
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