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CHAPTER 16 INTERRUPT AND TEST FUNCTIONS
User’s Manual U11302EJ4V0UM
(4) External interrupt mode register (INTM0)
This register sets the valid edge for INTP0 to INTP2 and TI0.
INTM0 is set with an 8-bit memory manipulation instruction.
RESET input clears INTM0 to 00H.
Remarks 1.
INTP0 is also used for TI0/P00.
2.
INTP3 is fixed to the falling edge.
Figure 16-5. Format of External Interrupt Mode Register
Caution
When using the INTP0/TI0/P00 pin as a timer input pin (TI0), stop the operation of the 16-bit timer
by clearing bits 1 to 3 (TMC01 to TMC03) of the 16-bit timer mode control register (TMC0) to 0,
0, 0, before setting the valid edge of TI0. When using the INTP0/TI0/P00 pin as an external
interrupt input pin (INTP0), the valid edge of INTP0 may be set while the 16-bit timer is operating.
6
5
4
3
2
1
0
7
Symbol
INTM0
ES31 ES30 ES21 ES20 ES11 ES10
0
0
FFECH 00H R/W
Address After reset R/W
ES11
0
0
1
INTP0/TI0 valid edge selection
Falling edge
Rising edge
Setting prohibited
ES10
0
1
0
1
Both falling and rising edges
1
ES21
0
0
1
INTP1 valid edge selection
Falling edge
Rising edge
Setting prohibited
ES20
0
1
0
1
Both falling and rising edges
1
ES31
0
0
1
INTP2 valid edge selection
Falling edge
Rising edge
Setting prohibited
ES30
0
1
0
1
Both falling and rising edges
1
Содержание mPD780204
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