73S8014R Maxim, 73S8014R Datasheet - Page 18

• Manufacturer Part Number: 73S8014R
• Description: The 73S8014R/RN devices are single smart card (ICC) interface circuits, firmware compatible with 8024-type devices for configurations where only asynchronous cards are to be supported, and are derived from the 73S8024RN industry standard electrical i
• Manufacturer: Maxim

3.6 Activation Sequence
The 73S8014R smart card interface ICs have an internal 10ms delay on the application of VDD where VDD >
V
low to activate the card. In order to initiate activation, the card must be present; there can be no VDD fault.
The following steps show the activation sequence and the timing of the card control signals when the system
controller sets CMDVCC low while the RSTIN is low:
The following steps show the activation sequence and the timing of the card control signals when the system
controller pulls the CMDVCC low while the RSTIN is high:
18
DDF
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. No activation is allowed during this 10ms period. The CMDVCC (edge triggered) signal must then be set
CMDVCC is set low at t
VCC will rise to the selected level and then the internal VCC control circuit checks the presence of VCC at
the end of t
valid at t
Turn I/O to reception mode at t
CLK is applied to the card at t
RST is a copy of RSTIN after t
CMDVCC is set low at t
VCC will rise to the selected level and then the internal VCC control circuit checks the presence of VCC at
the end of t
valid at t
At the fall of RSTIN at t
RST is a copy of RSTIN after t
CMDVCC
t
t
t
1
1
1
2
3
RSTIN
, the OFF goes low to report a fault to the system controller, and VCC to the card is shut off.
, the OFF goes low to report a fault to the system controller, and VCC to the card is shut off.
VCC
RST
CLK
= 0.510 ms (timing by 1.5MHz internal Oscillator)
= 1.5μs, I/O goes to reception state
= >0.5μs, CLK starts, RST to become the copy of RSTIN
I/O
Figure 4: Activation Sequence – RSTIN Low When CMDVCC Goes Low
1
1
. In normal operation, the voltage VCC to the card becomes valid before t
. In normal operation, the voltage VCC to the card becomes valid before t
2
0
0
, CLK is applied to the card
.
.
t
0
3
3
2
.
2
.
.
.
t
1
t
2
t
3
1
1
. If VCC is not
. If VCC is not
Rev. 1.0