Datasheet

73S1215F Data Sheet DS_1215F_003
1.7.15 Smart Card Interface Function
The 73S1215F 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 8010
family of interface devices. Figure 15 shows the simplified block diagram of the card circuitry (UART +
interfaces), with detail of dedicated XRAM registers.
iple smart cards to be connected using the Teridian 8010
family of interface devices. Figure 15 shows the simplified block diagram of the card circuitry (UART +
interfaces), with detail of dedicated XRAM registers.
Direct
Mode
Card
Insertion
Activation /
Deactivation
Sequencer
VCC
Buffer / Level
Shifter
RST
Buffer / Level
Shifter
CLK
I/O
Buffer / Level
Shifter
C4
Buffer / Level
Shifter
C8
Buffer / Level
Shifter
VCC Card
Generation
ICC Event
ICC Pwr_event
I/O ICC#1
I/OExt. ICC
CLK ICC
CLKExt. ICC
Card Clock
Management
7.2MHz
SCCLK/
SCSCLK
PRES
Serial
UART
Internal ICC Interface
SCSel
UART
T=0 T=1
RLength
STSTO
ATRMsB/LsB
BGT/EGT
SRXData
SRXCtl
STXData
STXCtl
SCPrtcol
SCCtl
FDReg
SByteCtl
SParCtl
Card Interrupt
Management
SCInt
SCIE
External ICC Interface
Bypass
Mode
XRAM Registers
VccCtl/
VccTMR
SCCLK/SCSCLK
Timers
2-Byte
Tx FIFO
2-Byte
Rx FIFO
Card and
Mode
Selection
TX
RX
SCDir
SCECtl
BGT0/1/2/3/
CWT0/1
SIO
SCLK
SCCLK
SCSCLK
Figure 15: Smart Card Interface Block Diagram Figure 15: Smart Card Interface Block Diagram
Card interrupts are managed through two dedicated registers SCIE (Interrupt Enable to define which
interrupt is enabled) and SCInt (Interrupt status). They allow the firmware to determine the source of an
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
Card interrupts are managed through two dedicated registers SCIE (Interrupt Enable to define which
interrupt is enabled) and SCInt (Interrupt status). They allow the firmware to determine the source of an
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
76 Rev. 1.4