MT89L85AP データシートの表示（PDF） - Mitel Networks
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MT89L85AP Datasheet PDF : 20 Pages
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Advance Information
MT89L85
AC Electrical Characteristics†- Microprocessor Bus
Voltages are with respect to ground (VSS) unless otherwise stated .
Characteristics
Sym Min Typ‡
Max Units Test Conditions
1 CS Setup from DS rising
2 R/W Setup from DS rising
3 Add setup from DS rising
4 CS hold after DS falling
5 R/W hold after DS falling
6 Add hold after DS falling
7 Data setup from DTA Low on Read
8 Data hold on read
tCSS
0
tRWS
5
tADS
5
tCSH
0
tRWH
5
tADH
8
tDDR
0
tDHR
10
9 Data setup on write (fast write)
10 Valid Data Delay on write
(slow write)
tDSW
0
25
tSWD
ns
ns
ns
ns
ns
ns
ns CL=150 pF
90
ns RL=1 KΩ*,
CL=150 pF
ns
122
ns
11 Data hold on write
tDHW
5
12 Acknowledgment Delay:
tAKD
Reading Data Memory
Reading/Writing Conn. Memory
Writing to Control Register
Reading Control Register
10
560
62/30
25
52
1220
120/53
65
120
ns
CL=150 pF
ns
ns
ns
ns
13 Acknowledgment Hold Time
tAKH
50
80
ns RL=1 KΩ*,
CL=150 pF
† Timing is over recommended temperature & power supply voltages .
‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.
* High Impedance is measured by pulling to the appropriate rail with RL, with timing corrected to cancel time taken to discharge CL.
DS
CS
R/W
A0-A6
D0-D7
READ
D0-D7
WRITE
DTA
tCSS
tRWS
tADS
tCSH
tRWH
tADH
tSWD
VALID DATA
tDSW
tDHR
VALID DATA
tDDR
tAKD
tDHW
tAKH
Figure 16 - Motorola Non-Multiplexed Bus Timing
VHM
VLM
VHM
VLM
VHM
VLM
VHM
VLM
VHM
VLM
VHM
VLM
VHM
VLM
17
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