m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 138

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

7.5.3 Operation in one-shot pulse mode
Figure 7.5.5 shows an example of operation in the one-shot pulse mode.
When a trigger is generated after
beginning from
countdown once after this new trigger is generated, and then, it continues counting with the reload register’s
contents reloaded. If generating a trigger during counting, make sure that a certain time which is equivalent
to one cycle of the timer’s count source or more has passed between the previously trigger occurrence and
a new trigger occurrence.
The one-shot pulse output from the TAi
2 to “0.” Accordingly, timer Ai can also be used as an internal one-shot timer that does not perform the
pulse output. In this case, the TAi
“L” level.
a trigger is generated.
the timer Ai register, the counter stops operating, the output level at pin TAi
Ai interrupt request does not occur.)
Additionally, the reload register’s contents are reloaded and the counter stops counting there.
This interrupt request bit remains set to “1” until the interrupt request is accepted or until the interrupt
request bit is cleared to “0” by software.
When the count start bit is set to “1,” the counter is enabled for counting. After that, counting starts when
When the one-shot pulse mode is selected with the operating mode select bits, the TAi
When the counter starts counting, the TAi
When the counter value becomes “0000
Simultaneously with
again. Furthermore, if a trigger is generated during counting, the counter performs
, the timer Ai interrupt request bit is set to “1.”
OUT
7905 Group User’s Manual Rev.1.0
pin functions as a programmable I/O port pin.
above, the counter and TAi
OUT
pin can be disabled by clearing the timer Ai mode register’s bit
16
,” the output from the TAi
OUT
pin outputs “H” level. (When a value of “0000
OUT
OUT
pin perform the same operations
7.5 One-shot pulse mode
pin becomes “L” level.
OUT
remains “L,” and no timer
TIMER A
OUT
pin outputs
16
” is set to
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