st8024l STMicroelectronics, st8024l Datasheet - Page 25

• Manufacturer Part Number: st8024l
• Description: Smartcard Interface
• Manufacturer: STMicroelectronics

ST8024L
6
Figure 10. Hardware hookup
1. These capacitors must be < 350 mΩ ESR and be placed near the IC (within 10 mm).
2. ST8024L and the microcontroller must use the same V
3. Make short, straight connections between CGND, C5 and the ground connection to the capacitor.
4. Mount one ESR-type (< 350 mΩ) 100 nF capacitor close to pin V
5. Mount one ESR-type (< 350 mΩ) 100 nF capacitor close to C1 contact.
6. The connection to C3 should be routed as far from C2, C7, C4 and C8 and, if possible, surrounded by grounded tracks.
7. This is the optional resistor bridge for changing the threshold of V
required, pin 18 should be connected to ground.
+5V
+3.3V
10µF
100nF
100nF
+
(1)
(1)
Applications
100kΩ
100nF
CLKDIV1
CLKDIV2
5/3V
PGND
C1 +
V
C1–
V
PRES
PRES
I/O
AUX2
AUX1
CGND
DDP
UP
(3)
Doc ID 17709 Rev 3
1
2
3
4
5
6
7
8
9
10
11
12
13
1
4
(normally closed type)
CARD READER
DD
ST8024L
C5
C6
C7
C8
100nF
100nF
supply.
C1
C2
C3
C4
(4)
(5)
K1
K2
(6)
28
27
26
25
24
23
22
21
20
19
18
17
16
1
CC
5
DD
.
when using the PORADJ function. If this bridge is not
AUX2UC
AUX1UC
I/OUC
XTAL2
XTAL1
OFF
GND
V
RSTIN
CMDVCC
V
RST
CLK
DD
CC
100nF
33pF
+3.3V
+3.3V
V
DD
R1
R2
PORADJ/1.8V
(2)
MICROCONTROLLER
+3.3 V POWERED
(7)
Applications
AM04930v1
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