AT89C5122D-PSTUM Atmel, AT89C5122D-PSTUM Datasheet - Page 91

• Manufacturer Part Number: AT89C5122D-PSTUM
• Description: IC 8051 MCU FLASH 32K 64QFN
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C5122D-PSTUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: SmartCard, SPI, UART/USART, USB
• Peripherals: LED, POR, WDT
• Number Of I /o: 46
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFN
• For Use With: AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Monitoring Procedure
Table 60. DC/DC converter status
4202F–SCR–07/2008
VCARDOK
0
0
1
1
ICARDOVF
0
1
0
1
advised to decrement the BOOST[1:0] bits to restore the overflow current to its normal
or desired value.
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.
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
AT83R5122, AT8xC5122/23
91