DS_8024RN_020
73S8024RN Data Sheet
1
Pin Description
Pin
28SO
11
13
12
16
15
Pin
20QFN
5
–
–
8
7
Pin
Description
32QFN
8
Card I/O: Data signal to/from card. Includes a pull-up
resistor to V
CC.
11
AUX1: Auxiliary data signal to/from card. Includes a
pull-up resistor to V
CC.
10
AUX2: Auxiliary data signal to/from card. Includes a
pull-up resistor to V
CC.
14
Card reset: provides reset (RST) signal to card.
13
Card clock: provides clock signal (CLK) to card. The rate
of this clock is determined by the external crystal
frequency or frequency of the external clock signal applied
on XTALIN and CLKDIV selections.
7
Card Presence switch: active high indicates card is
present. Should be tied to GND when not used, but it
Includes a high-impedance pull-down current source.
6
Card Presence switch: active low indicates card is
present. Should be tied to V
DD
when not used, but it
Includes a high-impedance pull-up current source.
15
Card power supply – logically controlled by sequencer,
output of LDO regulator. Requires an external filter
capacitor to the card GND.
12
Card ground.
CARD INTERFACE
Name
I/O
AUX1
AUX2
RST
CLK
PRES
10
4
PRES
9
3
VCC
17
9
GND
14
6
MISCELLANEOUS INPUTS AND OUTPUTS
Name
XTALIN
XTALOUT
VDDF_ADJ
Pin
28SO
24
25
18
Pin
20QFN
15
16
–
Pin
32QFN
23
24
17
Description
Crystal oscillator input: can either be connected to crystal
or driven as a source for the card clock.
Crystal oscillator output: connected to crystal. Left open
if XTALIN is being used as external clock input.
V
DD
fault threshold adjustment input: this pin can be used
to adjust the V
DDF
values (that controls deactivation of the
card). Must be left open if unused.
Non-connected pin.
NC
5
–
2, 9,
16, 25,
32
POWER SUPPLY AND GROUND
Name
VDD
VPC
GND
GND
Pin
28SO
21
6
4
22
Pin
20QFN
12
2
1
13
Pin
32QFN
20
3
1
21
Description
System interface supply voltage and supply voltage for
internal circuitry.
LDO regulator power supply source.
LDO Regulator ground.
Digital ground.
Rev. 1.8
5
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
