NCN8024R
VDDP
10 uF
100 nF
VDDP
VDD
100 nF
Microcontroller
VDD
INT
VDD
R1
R2
CRD_PRES
CRD_PRES
SMART CARD
PORADJ
DET
DET
GND
GND
CMDVCC
5V/3V
100 nF
220 nF
GND
Vpp
CRD_VCC
CRD_RST
CRD_CLK
CRD_AUX1
CRD_AUX2
CRD_IO
Vcc
RST
CLK
C4
GND
5
6
7
1
2
3
CLKDIV1
CLKDIV2
I/O
C8
8
4
CLKIN
RSTIN
I/Ouc
CRD_GND
GNDP
AUX1uc
AUX2uc
GND
GND
Figure 1. Typical Smart Card Interface Application
CLKDIV1
AUX2uc
AUX1uc
I/Ouc
1
28
27
26
25
24
23
22
21
20
19
18
17
CLKDIV2
5V/3V
2
3
NC
GNDP
NC
4
CLKIN
5
6
VDDP
NC
INT
GND
7
VDD
NC
8
RSTIN
9
CRD_PRES
CRD_PRES
10
11
12
13
14
CMDVCC
PORADJ
CRD_I/O
CRD_AUX2
CRD_AUX1
CRD_GND
CRD_VCC
CRD_RST
CRD_CLK
16
15
Figure 2. SOIC−28 and TSSOP−28 Pinout (Top View)
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