m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 136
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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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7.5.2 Trigger
The counter is enabled for counting when the count start bit (addresses 40
counter starts counting when a trigger is generated after counting has been enabled. An internal or external
trigger can be selected as that trigger.
An internal trigger is selected when the trigger select bits (bits 4 and 3 at addresses 56
DA
If a trigger is generated during counting, the reload register’s contents are reloaded and the counter
continues counting. If a trigger generated 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.
(1) When selecting internal trigger
(2) When selecting external trigger
16
) are “00
shows the structures of the one-shot start registers 0 and 1.
to 5A
correspond to the TAi
A trigger is generated when writing “1” to the one-shot start bit (addresses 42
A trigger is generated at the falling edge of the TAi
When using an external trigger, set the port P6, port P2, and port P4 direction registers’ bits which
16
, D6
2
” or “01
16
to DA
2
”; an external trigger is selected when the bits are “10
16
is “0,” or at its rising edge when bit 3 is “1.”
IN
pins for the input mode.
7905 Group User’s Manual Rev.1.0
IN
pin’s input signal when bit 3 at addresses 56
7.5 One-shot pulse mode
16
, 41
2
16
” or “11
) has been set to “1.” The
16
, 43
2
.”
16
TIMER A
16
to 5A
). Figure 7.5.4
16
, D6
7-33
16
to
16
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