73S1209F Maxim, 73S1209F Datasheet - Page 78

• Manufacturer Part Number: 73S1209F
• Description: The 73S1209F is a self-contained, SoC smart card reader IC that is an ideal solution for serially connected ISO 7816 design
• Manufacturer: Maxim

Synchronous card operation is broken down into three primary types. These are commonly referred to as
2-wire, 3-wire and I2C synchronous cards. Each card type requires different control and timing and
therefore requires different algorithms to access. Teridian has created an application note to provide
detailed algorithms for each card type. Refer to the application note titled 73S12xxF Synchronous Card
Design Application Note.
78
Protection Bit Data
RLength Interrupt
TX/RX Mode Bit
RLength Interrupt
CLK Stop Level = 0
TX = '1'
RLength Count
RLength Count
(Bit 9)
RLength = 9
RLength = 9
RX data
CLK Stop
CLK
CLK
IO
when Rlength counter is
1._ Interrupt generated
Figure 23: Operation of 9-bit Mode in Sync Mode
when Rlength counter is Max
Rlen=8
1._ Interrupt generated
Data from Card
Max
Rlen=8
(Bit 8)
Stop CLK after receiving the last byte and protection bit.
Receive data in 9 bit mode
2._ Read and clear
RLength Count MAX
RLength Count MAX
Interrupt
Rlen=9
Rlen=9
Protection Bit
(Bit 9)
(Data from Card is ready for CPU read)
Rlen=0
3._ Reload RLength
Protection Bit is ready for CPU read
2._Stop CLK after the last
byte and protection bit
RX FIFO
counter
Rlen =1
Data from Card
(Bit 1)
Rev. 1.2