ST7PSCR1E4M1/XXX View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST7PSCR1E4M1/XXX

8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER

STMicroelectronics 

ST7SCR

SMARTCARD INTERFACE (Cont’d)

SMARTCARD INTERRUPT PENDING REGIS-

TER (CRDIPR)

Read Only

Reset Value: 0000 0000 (00h)

7

0

TXBE - IOVF VCRD WTP TXCP RXC PAR

P

P

P

P

P

This register indicates the interrupt source. It is

cleared after a read operation.

Bit 7 = TXBEP Transmit buffer empty interrupt

pending.

This bit is set by hardware when a TXBE event oc-

curs and the TXBEM bit is set.

0: No TXBE interrupt pending

1: TXBE interrupt pending

Bit 6 = Reserved.

Bit 5 = IOVF Card Overload Current interrupt

pending.

This bit is set by hardware when a IOVF event oc-

curs and the IOVFM bit is set.

0: No IOVF interrupt pending

1: IOVF interrupt pending

Bit 4 = VCRDP Card Voltage Error interrupt pend-

ing.

This bit is set by hardware when the VCARDOK bit

goes from 1 to 0 while the VCRDM bit is set.

0: No VCRD interrupt pending.

1: VCRD interrupt pending.

Bit 3 = WTP Waiting Timer Overflow interrupt

pending.

This bit is set by hardware when a WTP event oc-

curs and the WTPM bit is set.

0: No WT interrupt pending

1: WT interrupt pending

that the CRDTXB buffer can be loaded with the

next character to be transmitted.

0: No TXC interrupt pending

1: TXC interrupt pending

Bit 1 = RXCP Received character interrupt pend-

ing.

This bit is set by hardware when a character is re-

ceived and the RXCM bit is set. It indicates that the

CRDRXB buffer can be read.

0: No RXC interrupt pending

1: RXC interrupt pending

Bit 0 = PARP Parity Error interrupt pending.

This bit is set by hardware when a PAR event oc-

curs and the PARM bit is set.

0: No PAR interrupt pending

1: PAR interrupt pending

SMARTCARD TRANSMIT BUFFER (CRDTXB)

Read/Write

Reset Value: 0000 0000 (00h)

7

0

TB7 TB6 TB5 TB4 TB3 TB2 TB1 TB0

This register is used to send a byte to the smart-

card.

SMARTCARD RECEIVE BUFFER (CRDRXB)

Read

Reset Value: 0000 0000 (00h)

7

0

RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0

This register is used to receive a byte from the

smartcard.

Bit 2 = TXCP Transmitted character interrupt

pending.

This bit is set by hardware when a character is

transmitted and the TXCM bit is set. It indicates

68/102

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