73s1209f68im Maxim Integrated Products, Inc., 73s1209f68im Datasheet - Page 89
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73s1209f68im
Manufacturer Part Number
73s1209f68im
Description
Self-contained Pinpad, Smart Card Reader Ic Uart To Iso7816 / Emv Bridge Ic
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.73S1209F68IM.pdf
(123 pages)
- Current page: 89 of 123
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DS_1209F_004
External Smart Card Control Register (SCECtl): 0xFE0B
This register is used to directly set and sample signals of External Smart Card interface. There are three
modes of asynchronous operation, an “automatic sequence” mode, and bypass mode. Clock stop per
the ISO 7816-3 interface is also supported but firmware must handle the protocol for SIO and SCLK for
I
should be handled via the I
be used for C4, C8 functions if necessary.
Rev. 1.2
2
C clock stop and start. Control for Reset (to make RST signal), activation control, voltage select, etc.
MSB
SCECtl.7
SCECtl.6
SCECtl.5
SCECtl.4
SCECtl.3
SCECtl.2
SCECtl.1
SCECtl.0
Bit
–
SCLKOFF
SCLKLVL
Symbol
SIOD
–
SIO
–
–
–
–
2
C interface when using external 73S73S8010x devices. USR(n) pins shall
SIO
External Smart Card I/O. Bit when read indicates state of pin SIO for
SIOD = 1 (Caution, this signal is not synchronized to the MPU clock), when
written, sets state of pin SIO for SIOD = 0. Ignored if not in bypass or sync
modes. In sync mode, this bit will contain the value of IO pin on the latest
rising edge of SCLK.
1 = input, 0 = output. External Smart Card I/O Direction control. Ignored if
not in bypass or sync modes.
Sets the state of SCLK when disabled by SCLKOFF bit. If in bypass mode,
this bit directly controls the state of SCLK.
0 = SCLK enabled, 1 = SCLK disabled. When disabled, SCLK level is
determined by SCLKLVL. This bit has no effect if in bypass mode.
Table 84: The SCECtl Register
SIOD
–
Function
0x00
–
SCLKLVL SCLKOFF
73S1209F Data Sheet
LSB
89
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