DS8007A Maxim, DS8007A Datasheet - Page 7

• Manufacturer Part Number: DS8007A
• Description: The DS8007A multiprotocol dual smart card interface is an automotive grade, low-cost, dual smart card reader interface supporting all ISO 7816, EMV™, and GSM11-11 requirements
• Manufacturer: Maxim

AC ELECTRICAL SPECIFICATIONS—TIMING PARAMETERS FOR MULTIPLEXED
PARALLEL BUS
(V
Figure 1. Multiplexed Parallel Bus Timing
XTAL1 Cycle Time
ALE Pulse Width
Address Valid to ALE Low
ALE Low to RD or WR Low
RD Pulse Width
RD Low to Data Read Valid
WR/RD High to ALE High
WR Pulse Width
Data Write Valid to WR Low
DD
D7–D0
ALE
WR
CS
RD
= 3.3V, V
PARAMETER
DDA
= 3.3V, T
_______________________________________________________________________________________
Multiprotocol Dual Smart Card Interface
t
W(ALE)
t
A
AVLL
= +25°C, unless otherwise noted.) (Figure 1)
ADDRESS
t
W(RD)
t
SYMBOL
t
CY(XTAL1)
t
(RWH-AH)
t
(AL-RWL)
t
t
t
(DV-WL)
t
(RL-DV)
W(ALE)
t
W(WR)
W(RD)
AVLL
t
(RL-DV)
t
(AL-RWL)
Register URR
Other registers
(READ)
DATA
CONDITIONS
t
(RWH-AH)
ADDRESS
t
(DV-WL)
2 x t
MIN
50
20
10
10
10
10
10
10
CY(XTAL1)
(WRITE)
DATA
t
W(WR)
TYP
MAX
50
t
(RWH-AH)
UNITS
ns
ns
ns
ns
ns
ns
ns
ns
ns
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