AT90SCR100 datasheet(194/433 Pages) ATMEL

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TPR0327AY–SMS–30Jan09

AT90SCR100

This bit is cleared by hardware if there is no card presence.

If global interrupts are activated and SCIER.CARDINE is set (one), and Card Presence goes

high, an interrupt is generated. See “Card Presence Input” on page 187.

• Bit 5 – Res: Reserved Bit

This bit is reserved and will always be read as ‘0’.

• Bit 4 – VCARDOK: Card Voltage Correct Status

This bit is set when the output voltage is within the voltage range specified by VCARD[1:0] in

SCICR register.

It is cleared otherwise.

• Bit 3 – SCWTO: Waiting Time Counter Timeout Status

This bit is set by hardware when the Waiting Time Counter has expired.

It is cleared by reloading the counter or by reseting the SCIB.

• Bit 2 – SCTC: UART Transmitted Character Status

This bit is set by hardware when the Smart Card UART has transmitted a character.

If character repetition mode is selected, this bit will be set only after a successful transmission. If

the last allowed repetition is not successful, this bit will not be set.

This bit must be cleared by software.

• Bit 1 – SCRC: UART Received Character Status

This bit is set by hardware when the Smart Card UART has received a character.

This bit must be cleared by software.

If character repetition mode is selected, this bit will be set only after a successful reception. If the

last allowed repetition is still unsuccessful, this bit will be set to let the user read the erroneous

value if necessary.

• Bit 0 – SCPE: Character Reception Parity Error Status

This bit is set when a parity error is detected on the received character.

This bit must be cleared by software.

If character repetition mode is selected, this bit will be set only if the ICC report an error on the

last allowed repetition of a TERMINAL transmission, or if a reception parity error is found on the

last allowed ICC character repetition.

To modify the bits CARDC8, CARDC4, CARDIO, CARDCLK and CARDRST in

Note

AT90SCR100 Datasheet(PDF) 194 Page - ATMEL Corporation