| 摘要 |
The card has a voltage supply circuit (2) to supply a primary voltage ranging from 3 to 5 volts to a microcontroller (3) including volatile and non-volatile memories. The microcontroller has a voltage regulator (7) that receives the primary supply voltage and generates a secondary supply voltage ranging from 1.2 to 1.8 volts. An additional memory (10) receives the secondary voltage through a supply bus (9).
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