CHAPTER 14 INTERRUPT/EXCEPTION PROCESSING FUNCTION
Preliminary User’s Manual U15905EJ1V0UD
439
(1) External interrupt rising edge specification register 0 (INTR0)
This is an 8-bit register that specifies detection of the rising edge of the INTP0 to INTP4 pins.
This register can be read or written in 8-bit or 1-bit units.
Caution
When the function is changed from the external interrupt function (alternate function) to the
port function, an edge may be detected. Therefore, clear INTF0n and INTR0n to 0, and then
set the port mode.
0
INTR0
0
INTR05
INTR04
INTR03
INTR02
INTR01
INTR00
After reset:
00H R/W
Address:
FFFFFC20H
Remark
For how to specify a valid edge, refer to
Table 14-4
.
(2) External interrupt falling edge specification register 0 (INTF0)
This is an 8-bit register that specifies detection of the falling edge of the INTP0 to INTP4 pins.
This register can be read or written in 8-bit or 1-bit units.
Caution
When the function is changed from the external interrupt function (alternate function) to the
port function, an edge may be detected. Therefore, clear INTF0n and INTR0n to 0, and then
set the port mode.
0
INTF0
0
INTF05
INTF04
INTF03
INTF02
INTF01
INTF00
After reset:
00H R/W
Address:
FFFFFC00H
Remark
For how to specify a valid edge, refer to
Table 14-4
.
Table 14-4. Valid Edge Specification
INTF0n
INTR0n
Valid Edge Specification (n = 1 to 5)
0
0
No edge detected
0
1
Rising edge
1
0
Falling edge
1
1
Both edges
Remark
n = 1 to 5: Control of INTP0 to INTP4 pins
Содержание V850ES/SA2 UPD703201
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