hd66100 Renesas Electronics Corporation., hd66100 Datasheet - Page 91

• Manufacturer Part Number: hd66100
• Description: H8/3867 Series
• Manufacturer: Renesas Electronics Corporation.

7. Wakeup Edge Select Register (WEGR)
WEGR is an 8-bit read/write register that specifies rising or falling edge sensing for pins WKPn.
WEGR is initialized to H'00 by a reset.
Bit n: WKPn edge select (WKEGSn)
Bit n selects WKPn pin input sensing.
Bit n
WKEGSn
0
1
3.3.3
There are 13 external interrupts: IRQ
1. Interrupts WKP
Interrupts WKP
WKP
rising or falling edge is input, the corresponding bit in IWPR is set to 1, requesting an interrupt.
Recognition of wakeup interrupt requests can be disabled by clearing the IENWP bit to 0 in
IENR1. These interrupts can all be masked by setting the I bit to 1 in CCR.
When WKP
number 9 is assigned to interrupts WKP
vector number, so the interrupt-handling routine must discriminate the interrupt source.
76
Bit
Initial value
Read/Write
0
. When these pins are designated as pins WKP
External Interrupts
7
to WKP
Description
WKPn pin falling edge detected
WKPn pin rising edge detected
7
WKEGS7
to WKP
R/W
7
7
0
to WKP
0
interrupt exception handling is initiated, the I bit is set to 1 in CCR. Vector
0
WKEGS6
are requested by either rising or falling edge input to pins WKP
0
R/W
6
0
WKEGS5
4
to IRQ
R/W
7
5
0
to WKP
0
WKEGS4
and WKP
R/W
0
. All eight interrupt sources have the same
4
0
7
to WKP
WKEGS3
7
to WKP
R/W
3
0
0
in port mode register 5 and a
WKEGS2
0
.
R/W
2
0
WKEGS1
R/W
1
0
(initial value)
WKEGS0
(n = 7 to 0)
R/W
7
0
0
to