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ST7SCR Datasheet(PDF) 65 Page - STMicroelectronics

Part # ST7SCR
Description  8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER
Download  101 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7SCR Datasheet(HTML) 65 Page - STMicroelectronics

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ST7SCR
65/101
SMARTCARD INTERFACE (Cont’d)
SMARTCARD INTERFACE STATUS REGISTER
(CRDSR)
Read only (Read/Write on some bits)
Reset Value: 1000 0000 (80h)
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.
70
TXBE
F
CRD
IRF
IOVF
VCARD
OK
WTF
TXC
F
RXC
F
PAR
F


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