Datasheet

DS8007
Multiprotocol Dual Smart Card Interface
8 _______________________________________________________________________________________
t
4
DATA IN
ADDRESS
WRITE
RELEASE
WITH CS
WRITE
RELEASE
WITH EN
t
6
t
7
t
1
t
8
DATA OUT
ADDRESS
CS
READ
WRITE
WR (EN)
RD (R/W)
AD3–AD0
D7–D0
CS
WR (EN)
CS
WR (EN)
RD (R/W)
AD3–AD0
D7–D0
t
2
t
3
t
5
Figure 2. Nonmultiplexed Parallel Bus Timing (Read and Write)
AC ELECTRICAL SPECIFICATIONS—TIMING PARAMETERS FOR NONMULTIPLEXED
PARALLEL BUS (READ AND WRITE)
(V
DD
= 3.3V, V
DDA
= 3.3V, T
A
= +25°C, unless otherwise noted.) (See Figure 2.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RD High to CS Low t
1
10 ns
Access Time CS Low to Data Out Valid t
2
50 ns
CS High to Data Out High Impedance t
3
10 ns
Data Valid to End of Write t
4
10 ns
Data Hold Time t
5
10 ns
RD Low to CS or WR Low t
6
10 ns
Address Stable to CS or WR High t
7
10 ns
Address to CS Low t
8
10 ns