19
IDT72V70800 3.3V TIME SLOT INTERCHANGE
DIGITAL SWITCH 512 x 512
COMMERCIAL TEMPERATURE RANGE
DS
CS
VALID WRITE ADDRESS
A0-A7
tCSS
tCSH
R/W
tRWS
tRWH
tADS tADH
VALID WRITE
DATA
AD0-AD7/
D8-D15
tDSW
tDHW
DTA
tAKD tAKH
tCSS
tCSH
tRWS
tRWH
VALID READ ADDRESS
tADS
tADH
VALID READ DATA
tDDR
tDHR
tAKD
tAKH
5709 drw14
Figure 14. Motorola Non-Multiplexed Asyncronous Bus Timing
AC ELECTRICAL CHARACTERISTICS-MOTOROLA NON-MULTIPLEXED BUS MODE
Symbol Parameter Min. Typ. Max. Units Test Conditions
t
CSS CS Setup from DS falling 0 ns
t
RWS R/W Setup from DS falling 10 ns
t
ADS Address Setup from DS falling 2 ns
t
CSH CS Hold after DS rising 0 ns
t
RWH R/W Hold after DS Rising 2 ns
t
ADH Address Hold after DS Rising 2 ns
t
DDR Data Setup from DTA LOW on Read 2 ns C
L
= 150pF
t
DHR Data Hold on Read 10 20 ns C
L
= 150pF, R
L
= 1K
t
DSW Data Setup on Write (Fast Write) 5 ns
t
SWD Valid Data Delay on Write (Slow Write) 122 ns
t
DHW Data Hold on Write 5 ns
t
AKD Acknowledgment Delay:
Reading/Writing Registers 43/43 ns C
L
= 150pF
Reading/Writing Memory 220/210 ns C
L
= 150pF
t
AKH
(1)
Acknowledgment Hold Time 22 ns C
L
= 150pF, R
L
= 1K
NOTE:
1. High Impedance is measured by pulling to the appropriate rail with R
L
, with timing corrected to cancel time taken to discharge C
L
.
