mb91101 Fujitsu Microelectronics, Inc., mb91101 Datasheet - Page 54

• Manufacturer Part Number: mb91101
• Description: 32-bit Risc Microcontroller Cmos
• Manufacturer: Fujitsu Microelectronics, Inc.

54
MB91101/MB91101A
10. External Interrupt/NMI Control Block
The external interrupt/NMI control block controls external interrupt request signals input to NMI pin and INT0 to
INT3 pins.
Detecting levels can be selected from “H”, “L”, rising edge and falling edge (not for NMI pin).
• Block diagram
• Register configuration
Interrupt
request
00000095
00000094
00000099
Address
( )
R/W
8
9
8
8
:Access
:Readable and writable
H
H
H
bit 15
Gate
Request level setting register
EIRR
Interrupt enable register
Interrupt cause register
Cause F/F
bit 8
ENIR
ELVR
Edge detection circuit
bit 0
00000000
00000000
00000000
Initial value
5
B
B
B
(R/W)
(R/W)
(R/W)
INT0 to INT3
NMI