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EM78P221/2N
8-Bit Microcontroller with OTP ROM
Product Specification (V1.0) 10.19.2007 • 37
(This specification is subject to change without further notice)
BANK0-RE/RF
BANK0-RE/RF RD
BANK0-RE/RF WR
BANK1-RE/RF RD
BANK1-RE/RF WR
BANK1-RE/RF
Fig. 6-8 Interrupt Input Circuit
Interrupt Sources
Interrupt
occurs
ENI/DISI
Stack ACC
Stack R3
RETI
ACC
R3 (2 ~0)
R4
Stack R4
R1 (5, 4 ,1 ,0)
Stack R1
Fig. 6-9 Interrupt Backup Diagram