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ST8024LCDR Datasheet(PDF) 26 Page - STMicroelectronics

Part # ST8024LCDR
Description  Smartcard interface
PDF  35 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST8024LCDR Datasheet(HTML) 26 Page - STMicroelectronics

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Functional description
ST8024L
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Doc ID 17709 Rev 5
Figure 9.
Emergency deactivation sequence (card extraction)
6.11
VCC selection settings
The ST8024L supports three smartcard VCC voltages: 1.8 V, 3 V, and 5 V. The VCC selection
is controlled by the 1.8V and 5V/3V signals as shown in Table 23. The 1.8V signal has
priority over the 5V/3V. When the 1.8 V pin is taken high, VCC is 1.8 V and it overrides any
setting on the 5V/3V pin.
When the 1.8V pin is taken low, the 5V/3V pin selects the 5 V or 3 V VCC. If the 5V/3V pin is
taken high, then VCC is 5 V, and if the 5V/3V pin is taken low then VCC is 3 V.
Table 23.
VCC selection settings
5V/3V pin
1.8V pin
VCC output
00
3 V
10
5 V
x1
1.8 V



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