73S1215F Maxim, 73S1215F Datasheet - Page 102
73S1215F
Manufacturer Part Number
73S1215F
Description
The Teridian 73S1215F is a self-contained SoC smart card reader IC that is an ideal solution for any USB-connected ISO 7816 design
Manufacturer
Maxim
Datasheet
1.73S1215F.pdf
(136 pages)
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Byte Control Register (SByteCtl): 0xFE12
This register controls the processing of characters and the detection of the TS byte. When receiving, a
Break is asserted at 10.5 ETU after the beginning of the start bit. Break from the card is sampled at 11
ETU.
102
SByteCtl.7
SByteCtl.6
SByteCtl.5
SByteCtl.4
SByteCtl.3
SByteCtl.2
SByteCtl.1
SByteCtl.0
Bit
MSB
–
BRKDUR.1
BRKDUR.0
DETTS
Symbol
DETTS
DIRTS
–
–
–
–
DIRTS
Detect TS Byte – 1 = Next Byte is TS, 0 = Next byte is not TS. When
set, the hardware will treat the next character received as the TS and
determine if direct or indirect convention is being used. Direct
convention is the default used if firmware does not set this bit prior to
transmission of TS by the smart card to the firmware. The hardware will
check parity and generate a break as defined by the DISPAR and
BRKGEN bits in the parity control register. This bit is cleared by
hardware after TS is received. TS is decoded before being stored in
the receive FIFO.
Direct Mode TS Select – 1 = direct mode, 0 = indirect mode.
Set/cleared by hardware when TS is processed indicating either
direct/indirect mode of operation. When switching between smart
cards, the firmware should write the bit appropriately since this register
is not unique to an individual smart card (firmware should keep track of
this bit).
Break Duration Select – 00 = 1 ETU, 01 = 1.5 ETU, 10 = 2 ETU, 11 =
reserved. Determines the length of a Break signal which is generated
when detecting a parity error on a character reception in T=0 mode.
Table 98: The SByteCtl Bit Functions
Table 97: The SByteCtl Register
BRKDUR.1 BRKDUR.0
0x2C
Function
–
–
–
LSB
Rev. 1.4
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