DS_8010C_024
73S8010C Data Sheet
1 Pin Description
1.1 Card Interface
Pin
(SO)
PIN
(QFN)
Name
Description
I/O
11
13
12
16
15
9
Card I/O: Data signal to/from card. Includes a pull-up resistor to VCC.
AUX1: Auxiliary data signal to/from card. Includes a pull-up resistor to VCC.
AUX2: Auxiliary data signal to/from card. Includes a pull-up resistor to VCC.
Card reset: provides reset (RST) signal to card.
AUX1
AUX2
RST
CLK
11
10
14
13
Card clock: provides clock (CLK) signal to card. The rate of this clock is
determined by the crystal oscillator frequency and CLKSEL bits in the
control register.
PRES
VCC
10
17
14
7
Card Presence switch: active high indicates card is present. Includes a
pull-down resistor.
15
12
Card power supply: logically controlled by sequencer, output of DC-DC
converter. Requires an external filter capacitor to the card GND.
GND
Card ground.
1.2 Miscellaneous Inputs and Outputs
PIN
(SO)
PIN
(QFN)
Name
Description
XTALIN
24
25
18
23
24
17
Crystal oscillator input: can either be connected to a crystal or driven
as a source for the card clock.
XTALOUT
Crystal oscillator output: connected to crystal. Left open if XTALIN is
being used as an external clock input.
VDDF_ADJ
VDD threshold adjustment input: this pin can be used to overwrite a
higher VDDF value (that controls deactivation of the card). Must be
left open if unused.
NC
7, 9
4, 6, 8, Non-connected pin.
16, 25,
32
1.3 Power Supply and Ground
PIN
(SO)
Pin
(QFN)
Name
Description
VDD
6, 21
3, 20 System controller interface supply voltage: supply voltage for internal
circuitry and DC-DC converter power supply source.
GND
GND
GND
LIN
4
14
22
5
1
12
21
2
DC-DC converter ground.
Smart Card I/O ground.
Digital ground.
External inductor: Connect external inductor from pin 5 to VDD. Keep the
inductor close to pin 5.
Rev. 1.5
5
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
