Z8018x Family
MPU User Manual
193
AC Characteristics
This section describes the AC characteristics of the Z8X180 family and
absolute maximum rating for these products.
AC CHARACTERISTICS—Z8S180
Table 31. Z8S180 AC Characteristics V = 5V ±10% or V
= 3.3V
DD
DD
±10%; 33-MHz Characteristics Apply Only to 5V Operation
Z8S180—20
MHz
Z8S180—33
MHz
No.
Symbol Item
Min
Max Min
Max
Unit
1
2
3
4
5
6
7
t
t
t
t
t
t
t
Clock Cycle Time
50
15
15
—
—
—
5
DC
—
—
10
10
30
—
30
10
10
—
—
—
5
DC
—
—
5
ns
ns
ns
ns
ns
ns
ns
CYC
CHW
CLW
CF
Clock “H” Pulse Width
Clock “L” Pulse Width
Clock Fall Time
Clock Rise Time
5
CR
PHI Rise to Address Valid Delay
15
—
AD
Address Valid to MREQ Fall or
IORQ Fall)
AS
8
9
t
t
PHI Fall to MREQ Fall Delay
—
25
25
25
—
—
—
15
15
15
ns
ns
MED1
RDD1
PHI Fall to RD Fall Delay IOC = 1 —
PHI Rise to RD Rise Delay IOC = —
0
10
11
t
t
PHI Rise to M1 Fall Delay
—
5
35
—
—
5
15
—
ns
ns
M1D1
AH
Address Hold Time from
MREQ, IOREQ, RD, WR High
12
t
PHI Fall to MREQ Rise Delay
—
25
—
15
ns
MED2
UM005001-ZMP0400
ZILOG [ ZILOG, INC. ]
