Z8S180 Zilog., Z8S180 Datasheet - Page 155

• Manufacturer Part Number: Z8S180
• Description: ENHANCED Z180 MICROPROCESSOR
• Manufacturer: Zilog.

140
UM005001-ZMP0400
Z 8018x Fam il y
M PU Us e r M anual
OVRN0
RDRF0
OVRN1
RDRF1
DCD0
PE0
FE0
PE1
FE1
RTS0 Flag
RTS0 Pin
Figure 54.
Figure 55 illustrates the ASCI interrupt request generation circuit.
Figure 55.
WR
Phi
TDRE1
TDRE0
TIE1
TIE0
RIE1
RIE0
RTS0 Timing Diagram
ASCI Interrupt Request Circuit Diagram
I/O Instruction
T1
IEF1
I/O write cycle
T2
T3
ASCI0 Interrupt
Request
ASCI1 Interrupt
Request
T1