m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 140
m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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[Precautions for one-shot pulse mode]
Fig. 7.5.6 Output delay in one-shot pulse output
1. If the count start bit is cleared to “0” during counting, the counter becomes as follows:
2. A one-shot pulse is output synchronously with an internally generated count source. Accordingly, when
3. When the timer’s operating mode has been set by one of the following procedures, the timer Ai interrupt
•The counter stops counting, and the reload register’s contents are reloaded into the counter.
•The TAi
•The timer Ai interrupt request bit is set to “1.”
selecting an external trigger, there will be a delay equivalent to one cycle of the count source at
maximum, in a period from when a trigger is input to the TAi
request bit will be set to “1.”
Accordingly, when using a timer Ai interrupt (interrupt request bit), be sure to clear the timer Ai interrupt
request bit to “0” after the above setting.
One-shot pulse
When the one-shot pulse mode is selected after reset
When the operating mode is switched from the timer mode to the one-shot pulse mode
When the operating mode is switched from the event counter mode to the one-shot pulse mode
input signal
output from
TAi
TAi
IN
source
OUT
Count
OUT
pin’s
pin
pin’s output level becomes “L.”
Note: The above applies when an external trigger (falling edge of TAi
7905 Group User’s Manual Rev.1.0
Trigger input
[Precautions for one-shot pulse mode]
IN
Starts outputting of one-shot pulse
pin until a one-shot pulse is output.
IN
pin’s input signal) is selected.
TIMER A
7-37
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