Preliminary Information
MT90810
AC Electrical Characteristics - Microprocessor Timing
Characteristics
Address Setup
Sym
Min.
Typ.
Max. Units
Test Conditions
1
2
3
4
tAS
tAH,
tDAC
tACC
5
5
ns
ns
Load Cap = 100pF for all
timing
Address Hold
Data Access from RDY High
25
ns
Microprocessor Access to Data
Ready
Register (Fast) Access
Memory (Slow) Access
ns
ns
50
800
5
7
6
8
Microprocessor to RDY low
tRDY
tDH
25
ns
ns
ns
ns
Data Hold
5
5
Data Setup
tDS
Data Enable Off
tDOFF
20
A[0:1]
t
t
t
AH
AS
CS
t
RDY
RDY
AS
t
DAC
RD
t
ACC
t
DOFF
AD[0:7]
(read)
WR
t
t
DH
DS
AD[0:7]
(read)
Note:
RDY is only driven low during memory (slow) cyles.
Figure 21 - Intel Non-multiplexed Bus Timing (ALE=VSS)
2-173
MITEL [ MITEL NETWORKS CORPORATION ]
