参数资料
型号: ST72SCR1R4T1
厂商: 意法半导体
英文描述: 8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER
中文描述: 8位低功耗,全速USB微控制器与16K的闪存,768内存,智能卡的I /楼,计时器
文件页数: 63/102页
文件大小: 1413K
代理商: ST72SCR1R4T1
ST7SCR
63/102
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.
7
0
TXBE
F
CRD
IRF
IOVF
VCARD
OK
WTF
TXC
F
RXC
F
PAR
F
相关PDF资料
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ST72FSCR1R4T1 8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER
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