73s1210f68im Maxim Integrated Products, Inc., 73s1210f68im Datasheet - Page 103
73s1210f68im
Manufacturer Part Number
73s1210f68im
Description
Self-contained Smart Card Reader With Pinpad And Power Management
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.73S1210F68IM.pdf
(126 pages)
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DS_1210F_001
1.7.16 VDD Fault Detect Function
The 73S1210F contains a circuit to detect a low-voltage condition on the supply voltage V
it will deactivate the active internal smart card interface when V
register configures the V
The user’s code may load a different value using the FOVRVDDF bit = 1 after the power-up cycle has
completed.
VDDFault Control Register (VDDFCtl): 0xFFD4 0x00
* Note: The V
73S1210F has the capability to burn fuses at the factory to set the factory default to any of these
voltages. Contact Teridian for further details.
Rev. 1.4
MSB
VDDFCtl.7
VDDFCtl.6 FOVRVDDF
VDDFCtl.5
VDDFCtl.4
VDDFCtl.3
VDDFCtl.2
VDDFCtl.1
VDDFCtl.0
Bit
–
FOVRVDDF VDDFLTEN
DD
VDDFLTEN Set = 1 will disable VDD Fault operation.
VDDFTH.2
VDDFTH.1
VDDFTH.0
Symbol
Fault factory default can be set to any threshold as defined by bits VDDFTH(2:0). The
–
–
–
DD
Fault threshold for the nominal default of 2.3V* or a user selectable threshold.
Setting this bit high will allow the VDDFLT(2:0) bits set in this register to control
the VDDFault threshold. When this bit is set low, the VDDFault threshold will
be set to the factory default setting of 2.3V*.
VDD Fault Threshold.
Bit Value(2:0)
000
001
010
011
100
101
110
111
Table 108: The VDDFCtl Register
2.3 (nominal default)
2.4
2.5
2.6
2.7
2.8
2.9
3.0
VDDFault Voltage
–
STXDAT.3 VDDFTH.2 VDDFTH.1 VDDFTH.0
DD
Function
falls below the V
DD
73S1210F Data Sheet
Fault threshold. The
DD
. If enabled,
LSB
103
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