Datasheet

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