73S8023C-IM データシートの表示（PDF） - Teridian Semiconductor Corporation

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73S8023C-IM

Smart Card Interface

Teridian Semiconductor Corporation 

DS_8023C_019

73S8023C Data Sheet

1 Pin Description

1.1 Card Interface

Name

I/O

AUX1

AUX2

RST

CLK

PRES

PRES

VCC

GND

Pin Description

9

Card I/O: Data signal to/from card. Includes a pull-up resistor to VCC.

11 AUX1: Auxiliary data signal to/from card. Includes a pull-up resistor to VCC.

10 AUX2: Auxiliary data signal to/from card. Includes a pull-up resistor to VCC.

14 Card reset: Provides reset (RST) signal to card.

13 Card clock: Provides clock (CLK) signal to card. The rate of this clock is

determined by crystal oscillator frequency and CLKDIV selections.

7 Card Presence switch: Active high indicates card is present. Includes a

pull-down current source.

6 Card Presence switch: Active low indicates card is present. Includes a pull-up

current source.

15 Card power supply: Logically controlled by sequencer, output of DC-DC

converter. Requires an external filter capacitor to the card GND.

12 Card ground.

1.2 Miscellaneous Inputs and Outputs

Name

Pin Description

XTALIN

23 Crystal oscillator input: can either be connected to crystal or driven as a

source for the card clock.

XTALOUT

24 Crystal oscillator output: connected to crystal. Left open if XTALIN is being

used as external clock input.

VDDF_ADJ

17

VDD fault threshold adjustment input: this pin can be used to adjust VDDF

value (that controls deactivation of the card). Must be left open if unused.

NC

4

Non-connected pin. Must be left open.

1.3 Power Supply and Ground

Name

VDD

GND

GND

LIN

Pin

3, 20

1

21

2

Description

System controller interface supply voltage: Supply voltage for internal power

supply and DC-DC converter power supply source.

DC-DC converter ground.

Digital ground.

External inductor. Connect external inductor from pin 2 to VDD. Keep the

inductor close to pin 2.

Rev. 1.5

5

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