73S1217F Maxim, 73S1217F Datasheet - Page 10

• Manufacturer Part Number: 73S1217F
• Description: The Teridian 73S1217F is a self-contained SoC smart card reader IC that is an ideal solution for any USB-connected ISO 7816 design
• Manufacturer: Maxim

OFF_REQ
TBUS(3:0)0
1
2
3
RXTX
ERST
ISBR
TCLK
ANA_IN
LED0
SEC
TEST
VDD
GND
RESET
Pin Name
* See the figures in the
10
52
50
46
44
41
43
38
39
15
51
68
28
40
25
42
67
3
4
2
9
1
Equivalent Circuits
GND
PSO
IO
IO
IO
IO
IO
DI
AI
O
I
I
I
Figure 36
Figure 41
Figure 39
Figure 40
Figure 40
Figure 35
section.
Description
Digital output. If ON_OFF switch is closed (to ground) for de-
bounce duration and circuit is “on,” OFF_REQ will go high
(Request to turn OFF). This output should be connected to
an interrupt pin to signal the CPU core that a request to shut
down power has been initiated. The firmware can then
perform all of its shut down housekeeping duties before
shutting down V
Trace bus signals for ICE.
ICE control.
ICE control.
ICE control.
ICE control.
Analog input pin. This signal goes to a programmable
comparator and is used to sense the value of an external
voltage.
Special output driver, programmable pull-down current to
drive LED. May also be used as an input.
Input pin for use in programming security fuse. It should be
connected to ground when not in use.
Test pin, should be connected to ground.
V
each VDD pin.
General ground supply pins for all IO and logic circuits.
Reset input, positive assertion. Resets logic and registers to
default condition. Note: to insure proper reset operation after
V
the ON/OFF switch, external reset circuitry must generate a
proper reset signal to the 73S1217F. This can be
accomplished via a simple RC network.
DD
DD
supply output pin. A 0.1μF capacitor is recommended at
is turned on by application of V
DD
.
BUS
power or activation of
Rev. 1.2