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SH7041A bảng dữ liệu(PDF) 489 Page - Renesas Technology Corp

tên linh kiện SH7041A
Giải thích chi tiết về linh kiện  Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)
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SH7041A bảng dữ liệu(HTML) 489 Page - Renesas Technology Corp

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12.11
Operation
12.11.1
Input Level Detection Operation
If the input conditions set by the ICSR occur on any of the
POE pins, all high-current pins become
high-impedance state.
Falling Edge Detection: When a change from high to low level is input to the
POE pins.
Low-Level Detection: Figure 12.126 shows the low-level detection operation. Sixteen continuous
low levels are sampled with the sampling clock established by the ICSR. If even one high level is
detected during this interval, the low level is not accepted.
CK
Sampling
clock
3
POE input
PE9/TIOC3B
When low level is sampled
at all points
When high level is sampled
at least once
Flag set
(POE received)
Flag not set
High-impedance
state*
Note: * Other large-current pins (PE11/TIOC3D, PE12/TIOC4A, PE13/TIOC4B/
MRES, PE14/TIOC4C/DACK0/AH,
PE15/TIOC4D/DACK1/
IROOUT) also go to the high-impedance state at the same time.
2
1
2
1
16
13
8/16/128 clock
cycles
Figure 12.126 Low-Level Detection Operation



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