Table 4-7: Valid Edge Specification - NEC V850E/RS1 User Manual

(j) External interrupt rising edge specification register 9H (INTR9H)
This is an 8-bit register used to specify detection of the rising edge for the external interrupt pin.
This register can be read and written in 8-bit or 1-bit units.
Cautions: 1. When switching from the external interrupt function (alternate function) to the
Figure 4-50: External Interrupt Rising Edge Specification Register 9H (INTR9H) Format
Symbol
INTR9H INTR915 INTR914 INTR913
R/W
Remark:
Remark:
154
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Chapter 4 Port Functions
port function, edge detection may occur. Therefore, set the port mode after set-
ting INTF9n = INTR9n bit = 0.
2. An on-chip circuit for eliminating noise through analog delay is provided for
external interrupt input.
7 6 5 4
0
R/W R/W R/W R/W
For details on valid edge specification, refer to Table 4-7, "Valid Edge Specification," on
page 154.

Table 4-7: Valid Edge Specification

INTF9n INTR9n
0 0
0 1
1 0
1 1
n = 13 to 15: Control of INTP4 to INTP6 pins
User's Manual U16702EE3V2UD00
3 2 1
0 0 0
R/W R/W R/W
Valid Edge Specification (n = 13 to 15)
No edge specified
Rising edge
Falling edge
Both edges
0 Address After reset
0 FFFFFC33H 00H
R/W