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| DS8023 Datasheet, PDF (15/17 Pages) Maxim Integrated Products – Smart Card Interface | |||
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DS8023
Smart Card Interface
GPIO
...
...
...
...
GPIO
ISOIO0
+3.3V
33pF
33pF 100nF
100nF
VDD
100nF
XTAL1 XTAL2 GND
CLKDIV1
CLKDIV2
5V/3V
1_8V
OFF
RSTIN
CMDVCC
AUX2IN
AUX1IN
I/OIN
VDD CP1
100nF
+10μF
CP2 VUP
PGND VDDA
PRES
VCC
RST
DS8023
CLK
I/O
AUX1
AUX2
CGND
MAXQ1103
GPIO
...
...
...
GPIO
ISOIO1
CLKDIV1
CLKDIV2
5V/3V
1_8V
OFF
RSTIN
CMDVCC
AUX2IN
AUX1IN
I/OIN
XTAL1 XTAL2 GND
VCC
RST
CLK
DS8023
I/O
AUX1
AUX2
VDD CP1
CGND
PRES
CP2 VUP
PGND VDDA
+10μF
100nF
33pF
33pF 100nF
100nF
+3.3V
100nF
VDD
*PLACE A 100nF CAPACITOR CLOSE TO DS8023 AND PLACE A 220nF CAPACITOR CLOSE TO CARD CONTACT.
**SCHEMATIC ASSUMES A NORMALLY CLOSED CONNECTION TO GROUND IN THE SOCKET. INSERTING A CARD
BREAKS THE CONNECTION AND PULLS PRES HIGH.
Figure 10. Typical Application Diagram
+3.3V
100kΩ**
100nF* 220nF*
100nF* 220nF*
100kΩ**
+3.3V
Maxim Integrated
15
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