AT89C5122DS-RDRUM datasheet(91/208 Pages) ATMEL

tên linh kiện	AT89C5122DS-RDRUM

Giải thích chi tiết về linh kiện	C51 Microcontroller with USB and Smart Card Reader Interfaces

PDF	208 Pages

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nhà sản xuất	ATMEL [ATMEL Corporation]

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AT83R5122, AT8xC5122/23

4202F–SCR–07/2008

advised to decrement the BOOST[1:0] bits to restore the overflow current to its normal

or desired value.

Monitoring Procedure

Once the DC/DC has been successfuly initialized, it is necessary to monitor the DC/DC

converter by means of bits VCARDOK and ICARDOVF in the SCISR register.

Table 60.

DC/DC converter status

VCARDOK

ICARDOVF

DC/DC Status

- Not Started or switched off by application.

The current overflow sensor is disabled during the DC/DC converter startup. Then if a current

overflow condition is applied during the DC/DC converter startup, the DC/DC converter is unable

to start and both bits VCARDOK and ICARDOVF remains at 0.

DC/DC converter correctly started then the output voltage is out of ISO/IEC 7816-3

specifications. In this case the firmware must take appropriate actions like deactivating the

DC/DC converter in compliance with ISO/IEC 7816.

Started and automatically switched off by a current overflow condition

Operating properly according to ISO/IEC 7816-3 and EMV recommendations

Not applicable

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