m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 546
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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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A
Q
(1) In both of the edge sense and level sense, an external interrupt request occurs when the
(2) There are two methods: one uses external interrupt’s level sense, and the other uses the
(1) Which timing of clock
(2) When external interrupt input (INT
Method using timer’s event counter mode
As for hardware, input an interrupt signal to the TAi
As for software, set the timer’s operating mode to the event counter mode. Then, set a value
of “0000
A timer’s interrupt request occurs when an interrupt signal (selected valid edge) is input.
input signal to the INT
timer’s event counter mode.
Method using external interrupt’s level sense
As for hardware, input a logical sum of multiple interrupt signals (e.g., ‘a’, ‘b’, and ‘c’) to the
INT
As for software, check the port pin’s input levels in the INT
which signal (‘a’, ‘b’, or ‘c’) was input.
In the edge sense, also, the interrupt request bit is set to “1” at this time.
i
pin, and input each signal to each corresponding port pin.
16
” into the timer register and select the valid edge.
a
b
c
i
1
pin changes its level. This is independent of clock
is the external interrupts (input signals to the INT
7905 Group User’s Manual Rev.1.0
i
) pins are not enough, what should I do?
Port pin
Port pin
Port pin
INT
M37905
i
IN
Appendix 8. 7905 Group Q & A
pin or TBi
i
interrupt routine in order to detect
IN
pin.
APPENDIX
i
pin) detected?
1
.
Interrupts
20-115
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