US38024-BAG1 Renesas Electronics America, US38024-BAG1 Datasheet - Page 155
![no-image](/images/manufacturer_photos/0/5/560/renesas_electronics_america_sml.jpg)
US38024-BAG1
Manufacturer Part Number
US38024-BAG1
Description
DEV EVALUATION KIT H8/38024
Manufacturer
Renesas Electronics America
Series
H8®r
Type
MCUr
Datasheet
1.US38024-BAG1.pdf
(684 pages)
Specifications of US38024-BAG1
Contents
2G (Second-generation) Evaluation Board, HEW debugger support, Cable and CD-ROM
For Use With/related Products
H8/38024
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
- Current page: 155 of 684
- Download datasheet (5Mb)
5.3.5
1. When external input signal changes before/after standby mode or watch mode
2. When external input signals cannot be captured because internal clock stops
3. Recommended timing of external input signals
When an external input signal such as IRQ, WKP, or IRQAEC is input, both the high- and
low-level widths of the signal must be at least two cycles of system clock φ or subclock φ
(referred to together in this section as the internal clock). As the internal clock stops in
standby mode and watch mode, the width of external input signals requires careful attention
when a transition is made via these operating modes. Ensure that external input signals
conform to the conditions stated in 3, Recommended timing of external input signals, below
The case of falling edge capture is illustrated in figure 5.3.
As shown in the case marked "Capture not possible," when an external input signal falls
immediately after a transition to active (high-speed or medium-speed) mode or subactive
mode, after oscillation is started by an interrupt via a different signal, the external input signal
cannot be captured if the high-level width at that point is less than 2 t
To ensure dependable capture of an external input signal, high- and low-level signal widths of
at least 2 t
mode, as shown in “Capture possible: case 1” in figure 5.3.
External input signal capture is also possible with the timing shown in “Capture possible: case
2” and “Capture possible: case 3” in figure 5.3, in which a 2 t
secured.
Notes on External Input Signal Changes before/after Standby Mode
cyc
or 2 t
subcyc
are necessary before a transition is made to standby mode or watch
Rev. 8.00 Mar. 09, 2010 Page 133 of 658
cyc
Section 5 Power-Down Modes
or 2 t
cyc
subcyc
or 2 t
level width is
REJ09B0042-0800
subcyc
.
SUB
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