ST7SCR_07 Datasheet, PDF(10/101 Page) STMicroelectronics – 8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER

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ST7SCR_07 Datasheet, PDF (10/101 Pages) STMicroelectronics – 8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER

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ST7SCR

PIN DESCRIPTION

Figure 5. Smartcard Interface Reference Application - 24-Pin SO Package

VDD

DIODE

GNDA

GND

CRDVCC

CRDRST

CRDCLK

CRDIO

CRDDET

PA0

PA1

SELF

VDD

VDDA

USBVcc

LED0

PA6

VPP

OSCOUT

OSCIN

VDD

D+

D-

LED VDD

CL1

CL2

Mandatory values for the external components :

C1 : 4.7 ÂµF 1)

C2 : 100nF 1)

C3 : 1 nF

C4 : 4.7 ÂµF,ESR 0.5 Ohm

C5 : 470 pF

C6 : 100 pF

R : 1.5kOhm

L1 : 10 ÂµH, 2 Ohm

Crystal 4.0 MHz, Impedance max100 Ohm

Cl1, Cl2 2)

D1: BAT42 SHOTTKY

Note 1: C1 and C2 must be located close to the Note 2: Refer to section 6 on page 21 & Section

chip.

14.4.3 Crystal Resonator Oscillators.

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