DS_1209F_004
73S1209F Data Sheet
Rev. 1.2
9
Pin Name
Pin (68 QFN)
Pin (44 QFN)
Type
Equivalent
Circuit*
Description
INT2 52
General purpose interrupt input.
SIO 50
IO data signal for use with external Smart Card interface
circuit such as 73S8010.
SCLK 48
Clock signal for use with external Smart Card interface
circuit.
PRES 64
Smart Card presence. Active high. Note: the pin has a
very weak pull down resistor. In noisy environments, an
external pull down may be desired to insure against a
false card event.
PRESB 56
35
Smart Card presence. Active low. Note: the pin has a
very weak pull up resistor. In noisy environments, an
external pull up may be desired to insure against a false
card event.
CLK 57
Smart card clock signal.
RST 59
Smart card Reset signal.
IO 63
Smart card Data IO signal.
AUX1 62
Auxiliary Smart Card IO signal (C4).
AUX2 61
Auxiliary Smart Card IO signal (C8).
VCC 60
39
PSO
Smart Card VCC supply voltage output. A 0.47
μ
F
capacitor is required and should be located at the smart
card connector. The capacitor should be a ceramic type
with low ESR.
GND 58
37
GND
Smart Card Ground.
VPC 55
34
PSI
Smart Card LDO regulator power supply source. A
10
μ
F and a 0.1
μ
F capacitor are required at the VPC
input. The 10
μ
F capacitor should be a ceramic type
with low ESR.
TBUS(3:0)
0
1
2
3
53
49
47
43
IO
Trace bus signals for ICE.
RXTX 45
28
IO
ICE control.
ERST 40
25
IO
ICE control.
ISBR 68
IO
ICE control.
TCLK 41
26
I
ICE control.
ANA_IN 15
10
AI
Analog input pin. This signal goes to a programmable
comparator and is used to sense the value of an
external voltage.
SEC 67
Input pin for use in programming security fuse. It should
be connected to ground when not in use.
TEST 54
Test pin, should be connected to ground.