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 INTERFACE STATUS REGISTER

(CRDSR)

Read only (Read/Write on some bits)

Reset Value: 1000 0000 (80h)

7

0

TXBE CRD

F

IRF

IOVF

VCARD

OK

WTF

TXC

F

RXC

F

PAR

F

Bit 7 =TxBEF Transmit Buffer Empty Flag.

- Read only

0: Transmit buffer is not empty

1: Transmit buffer is empty

Bit 6 = CRDIRF Card Insertion/Removal Flag.

- Read only

0: No card is present

1: A card is present

Bit 5 = IOVF Card Overload Current Flag.

- Read only

0: No card overload current

1: Card overload current

Bit 4 = VCARDOK Card voltage status Flag.

- Read only

0: The card voltage is not in the specified range

1: The card voltage is within the specified range

Bit 3 = WTF Waiting Time Counter overflow Flag.

- Read only

0: The WT Counter has not reached its maximum

value

1: The WT Counter has reached its maximum val-

ue

Bit 2 = TXCF Transmitted character Flag.

- Read/Write

This bit is set by hardware and cleared by soft-

ware.

0: No character transmitted

1: A character has been transmitted

Bit 1 = RXCF Received character Flag.

- Read only

This bit is set by hardware and cleared by hard-

ware when the CRDRXB buffer is read.

0: No character received

1: A character has been received

Bit 0 = PARF Parity Error Flag.

- Read/Write

This bit is set by hardware and cleared by soft-

ware.

0: No parity error

1: Parity error

Note: When a character is received, the RXCF bit

is always set.When a character is received with a

parity error, the PARF bit is also set.

63/102

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