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參數(shù)資料
| 型號： | ST72521AR7TC/XXX |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 10 X 10 MM, PLASTIC, TQFP-64 |
| 文件頁數(shù)： | 14/199頁 |
| 文件大?。?/td> | 1979K |
| 代理商： | ST72521AR7TC/XXX |
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ST72521M/R/AR
110/199
SERIAL COMMUNICATIONS INTERFACE (Cont’d)
CONTROL REGISTER 2 (SCICR2)
Read/Write
Reset Value: 0000 0000 (00 h)
Bit 7 = TIE
Transmitter interrupt enable.
This bit is set and cleared by software.
0: Interrupt is inhibited
1: An SCI interrupt is generated whenever
TDRE=1 in the SCISR register
Bit 6 = TCIE
Transmission complete interrupt ena-
ble
This bit is set and cleared by software.
0: Interrupt is inhibited
1: An SCI interrupt is generated whenever TC=1 in
the SCISR register
Bit 5 = RIE
Receiver interrupt enable.
This bit is set and cleared by software.
0: Interrupt is inhibited
1: An SCI interrupt is generated whenever OR=1
or RDRF=1 in the SCISR register
Bit 4 = ILIE
Idle line interrupt enable.
This bit is set and cleared by software.
0: Interrupt is inhibited
1: An SCI interrupt is generated whenever IDLE=1
in the SCISR register.
Bit 3 = TE
Transmitter enable.
This bit enables the transmitter. It is set and
cleared by software.
0: Transmitter is disabled
1: Transmitter is enabled
Notes:
– During transmission, a “0” pulse on the TE bit
(“0” followed by “1”) sends a preamble (idle line)
after the current word.
– When TE is set there is a 1 bit-time delay before
the transmission starts.
Caution: The TDO pin is free for general purpose
I/O only when the TE and RE bits are both cleared
(or if TE is never set).
Bit 2 = RE
Receiver enable.
This bit enables the receiver. It is set and cleared
by software.
0: Receiver is disabled
1: Receiver is enabled and begins searching for a
start bit
Bit 1 = RWU
Receiver wake-up.
This bit determines if the SCI is in mute mode or
not. It is set and cleared by software and can be
cleared by hardware when a wake-up sequence is
recognized.
0: Receiver in Active mode
1: Receiver in Mute mode
Note: Before selecting Mute mode (setting the
RWU bit), the SCI must receive some data first,
otherwise it cannot function in Mute mode with
wakeup by idle line detection.
Bit 0 = SBK
Send break.
This bit set is used to send break characters. It is
set and cleared by software.
0: No break character is transmitted
1: Break characters are transmitted
Note: If the SBK bit is set to “1” and then to “0”, the
transmitter will send a BREAK word at the end of
the current word.
70
TIE
TCIE
RIE
ILIE
TE
RE
RWU
SBK
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