73S1217F Maxim, 73S1217F Datasheet - Page 78

• Manufacturer Part Number: 73S1217F
• Description: The Teridian 73S1217F is a self-contained SoC smart card reader IC that is an ideal solution for any USB-connected ISO 7816 design
• Manufacturer: Maxim

Card interrupts are managed through two dedicated registers
interrupt is enabled) and
interrupt, that can be a card insertion / removal, card power fault, or a transmission (TX) or reception (RX)
event / fault. It should be noted that even when card clock is disabled, an ICC interrupt can be generated
on a card insertion / removal to allow power saving modes. Card insertion / removal is generated from
the respective card switch detection inputs (whose polarity is programmable).
1.7.17 Smart Card Interface Function
The 73S1217F integrates one ISO-7816 (T=0, T=1) UART, one complete ICC electrical interface as well
as an external smart card interface to allow multiple smart cards to be connected using the Teridian
73S8010x family of interface devices. Figure 16 shows the simplified block diagram of the card circuitry
(UART + interfaces), with detail of dedicated XRAM registers.
78
ATRMsB/LsB
BGT0/1/2/3/
XRAM Registers
BGT/EGT
SRXData
SByteCtl
SCPrtcol
STXData
RLength
CWT0/1
SParCtl
SCECtl
STXCtl
SRXCtl
STSTO
FDReg
SCCtl
SCInt
SCIE
7.2MHz
SCInt
Management
Card Interrupt
Card Clock
Management
Figure 16: Smart Card Interface Block Diagram
Rx FIFO
T=0 T=1
Tx FIFO
Timers
2-Byte
2-Byte
UART
SCSCLK
SCCLK/
(Interrupt status). They allow the firmware to determine the source of an
CLK ICC
CLKExt. ICC
Direct
Mode
Selection
Card and
SCCLK/SCSCLK
Serial
UART
Mode
ICC Event
ICC Pwr_event
SCSel
I/O ICC#1
TX
RX
SCIE
Deactivation
(Interrupt Enable to define which
Activation /
Sequencer
SCDir
Internal ICC Interface
External ICC Interface
Generation
Buffer / Level
Buffer / Level
Buffer / Level
Buffer / Level
Buffer / Level
VCC Card
Insertion
Shifter
Shifter
Shifter
Shifter
Shifter
Card
SCSCLK
SCCLK
VccTMR
VccCtl/
Rev. 1.2
PRES
SCLK
VCC
RST
CLK
C8
SIO
I/O
C4