AT83C24-PRRIL ATMEL [ATMEL Corporation], AT83C24-PRRIL Datasheet - Page 36

• Manufacturer Part Number: AT83C24-PRRIL
• Description: Smart Card Reader Interface with Power Management
• Manufacturer: ATMEL [ATMEL Corporation]

Typical NDS Application
Figure 2. Typical NDS Standard Mode Application Diagram for 1 AT83C24NDS.
36
18.432 or 27MHz
Host
MICROCONTROLLER
AT83C24
XTAL1
VSS
XTAL2
VSS
EVCC
VCC
Px.y
Px.y
Px.y
Px.y
TWI
RST
INT0
Note:
See note1
for I/O pull up
1. The external resistor on I/O can be removed if the host pin has an internal resistor.
2. The internal pull up on PRES/INT is disabled during reset (recommended external
3. Refer to application note for AT83C24NDS software configuration.
20kOhms pull up).
See note 2
SDA,
SCL
pullups
V
CC
Reset
pullup
A0/3V
A2/CLK
A1/RST
RESET
PRES/INT
I/O, C4, C8
SDA
SCL
CLK
AT83C24NDS
VSS
100nF
C13
DVCC
VSS
100nF
L1
CIO, CC4, CC8
4.7µH
CPRES
CVCCin
CVCC
CCLK
CRST
CVSS
C1
CVSS
VSS
1uF
C2
VSS
2.2µF
4234E–SCR–09/04
Smart
Card 1
CVSS
V
present
CC
2.2uF
C3
card
CVSS
100nF
C10