HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 732
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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Section 18 Multi-Function Timer Pulse Unit (MTU)
2. Low-Level Detection
Output-Level Compare Operation: Figure 18.117 shows an example of the output-level
compare operation for the combination of TIOC3B/PTE[6] and TIOC3D/PTE[4]. The operation is
the same for the other pin combinations.
Rev. 4.00 Sep. 14, 2005 Page 682 of 982
REJ09B0023-0400
Pφ
Sampling
clock
POE input
TIOC3B/
PTE[6]
When low level is
sampled at all points
When high level is
sampled at least once
Note: *
Figure 18.116 shows the low-level detection operation. Sixteen continuous low levels are
sampled with the sampling clock established by the ICSR1. If even one high level is detected
during this interval, the low level is not accepted.
Furthermore, the timing when the large-current pins enter the high-impedance state from the
sampling clock is the same in both falling-edge detection and in low-level detection.
Pφ
TIOC3B/
PTE[6]
TIOC3D/
PTE[4]
Other high-current pins (TIOC3D/PTE[4], TIOC4A/PTE[3], TIOC4B/PTE[2], TIOC4C/PTE[1],
and TIOC4D/PTE[0]) also become the Hi-Z state at the same timing.
Figure 18.117 Output-Level Detection Operation
Figure 18.116 Low-Level Detection Operation
1
1
8/16/128 clock
cycles
2
2
3
0 level overlapping detected
Hi-Z
16
13
Hi-Z state*
Flag set
(POE received)
Flag not set
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