Z8S180 Zilog., Z8S180 Datasheet - Page 93

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

78
UM005001-ZMP0400
Z 8018x Fam il y
M PU Us e r M anual
A0
D0
MREQ
IORQ
–
INT0
–
A19
WR
Phi
RD
M1
D7
ST
Figure 38.
INT0 Mode 2
This method determines the restart address by reading the contents of a
table residing in memory. The vector table consists of up to 128 two-byte
restart addresses stored in low byte, high byte order.
Last MC
INT0 Mode 1 Timing
T1
T2
TW*
INT0 Acknowledge Cycle
PC
TW*
T3
T1
*Two Wait States are automatically inserted
PC is pushed onto stack
T2
SP-1
PCH
T3
T1
T2
SP-2
PCL
T3
T1
Op Code Fetch Cycle
T2
0038H
T3