mb90f377pff-g Fujitsu Microelectronics, Inc., mb90f377pff-g Datasheet - Page 100

• Manufacturer Part Number: mb90f377pff-g
• Description: 16-bit Proprietary Microcontroller
• Manufacturer: Fujitsu Microelectronics, Inc.

100
MB90370/375 Series
21. Wake-up interrupt
Wake-up interrupt pins :
Wake-up interrupt sources : “L” level signal input to a wake-up interrupt pin.
Interrupt control :
Interrupt flag :
Interrupt request :
(1) Register configuration of wake-up interrupt
(2) Block diagram of wake-up interrupt
Wake-up Interrupt Flag Register
Wake-up Interrupt Control Register
The wake-up interrupt circuit detects the signals of the “L” levels input to the external interrupt pins and to
generate interrupt request to the CPU. These interrupts can wake up the CPU from standby mode.
P05/KSI5
P04/KSI4
P02/KSI2
P07/KSI7
P06/KSI6
P03/KSI3
P01/KSI1
P00/KSI0
Address : 0000AD
Address : 0000AC
Initial value
Initial value
Read/write
Read/write
H
H
7
8 pins (P00/KSI0 to P07/KSI7) .
Enables or disables to input wake-up interrupt controlled by wake-up interrupt control
register (EICR) .
IRQ flag bit of wake-up interrupt flag register (EIFR) . Flag set
when there is an IRQ.
Interrupt request #20 is generated if any enabled external interrupt pin goes LOW.
6
EN7
R/W
15
7
0
5
EN6
R/W
14
6
0
4
Interrupt Request Generator
3
EN5
R/W
13
5
0
2
EN4
R/W
12
1
4
0
0
EN3
R/W
11
3
0
EICR
EN2
R/W
10
2
0
EN1
R/W
1
0
9
EN0
R/W
R/W
WIF
0
0
8
0
EIFR
Bit number
EIFR
Bit number
EICR