upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 711

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

(5)
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Caution:
Remark:
External interrupt falling edge specification register 3 (INTF3)
This is an 8-bit register that specifies detection of the falling edge of the external interrupt pins.
This register can be read or written in 8-bit or 1-bit units.
External interrupt rising edge specification register 3 (INTR3)
This is an 8-bit register that specifies detection of the rising edge of the external interrupt pins.
This register can be read or written in 8-bit or 1-bit units.
Figure 17-19: External Interrupt Falling Edge Specification Register 3 (INTF3) Format
Figure 17-20: External Interrupt Rising Edge Specification Register 3 (INTR3) Format
INTR3
INTF3n
INTF3
tion) to the port function, an edge may be detected. Therefore, clear INTF3n and
INTR3n to 0, and then set the port mode.
For how to specify a valid edge, refer to Table 17-6.
When the function is changed from the external interrupt function (alternate function)
to the port function, an edge may be detected. Therefore, clear INTF3n and INTR3n to
0, and then set the port mode.
For how to specify a valid edge, refer to Table 17-6.
Be sure to set INTF3 and INTR3 to 00 when these terminals are not used as external
interrupt function.
n = 1: Control of INTP7
n = 7: Control of INTP1
When the function is changed from the external interrupt function (alternate func-
0
0
1
1
After reset: 00H
After reset: 00H
INTR37
INTF37
7
7
Chapter 17 Interrupt/Exception Processing Function
INTR3n
0
1
0
1
User’s Manual U16702EE3V2UD00
Table 17-6: Valid Edge Specification
6
0
6
0
No edge detected
Rising edge
Falling edge
Both edges
R/W
R/W
5
0
5
0
Valid Edge Specification (n = 1, 7)
4
0
4
0
3
0
3
0
Address: FFFFFC06H
Address: FFFFFC26H
2
0
2
0
INTR31
INTF31
1
1
0
0
0
0
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