參數(shù)資料
型號(hào)： QSMRM
英文描述： QSMRM QSM Queued Serial Module Reference Manual
中文描述： QSMRM QSM排隊(duì)串行模塊參考手冊
文件頁數(shù)： 64/112頁
文件大?。?/td> 1496K
代理商： QSMRM
MOTOROLA
5-8
SCI SUBMODULE
QSM
REFERENCE MANUAL
The ninth data bit could also serve as a second stop bit. By setting this bit permanently
to one, communication with other SCIs requiring two stop bits could be accommodat-
ed.
Note that only 10 or 11 bits in a frame are allowed. If parity is to be enabled, the last
data bit must be used for this purpose. The parity bit may be odd, even, mark, or
space. Parity and address (control) bits are mutually exclusive. A choice must be
made between one or the other, or neither. Every frame must have one start bit and at
least one stop bit. The possible combinations are given in the bit description of PE.
WAKE — Wakeup by Address Mark
1 = SCI receiver awakened by address mark (eighth or ninth (last) bit set)
0 = SCI receiver awakened by idle-line detection
WAKE determines which one of two conditions wakes up the SCI receiver when it is
in wakeup mode. If WAKE is clear (its reset value), the detection of an idle line (10 or
11 contiguous ones) which clears RWU causes the SCI receiver to wake up. If WAKE
is set, the detection of an address mark (the last data bit of a frame is set) which clears
RWU causes the SCI receiver to wake up.
TIE — Transmit Interrupt Enable
1 = SCI TDRE interrupts enabled
0 = SCI TDRE interrupts inhibited
When set, TIE enables an SCI interrupt whenever the TDRE flag in SCSR is set. The
interrupt is blocked by negating TIE.
TCIE — Transmit Complete Interrupt Enable
1 = SCI TC interrupts enabled
0 = SCI TC interrupts inhibited
When set, TCIE enables an SCI interrupt whenever the TC flag in SCSR is set. The
interrupt may be cleared by reading SCSR when TC is set and then by writing the
transmit data register (TDR) of SCDR. The interrupt is blocked by negating TCIE.
RIE — Receiver Interrupt Enable
1 = SCI RDRF interrupts enabled
0 = SCI RDRF interrupts inhibited
When set, RIE enables an SCI interrupt whenever the RDRF flag in SCSR is set. The
interrupt is blocked by negating RIE.
ILIE — Idle-Line Interrupt Enable
1 = SCI IDLE interrupts enabled
0 = SCI IDLE interrupts inhibited
When set, ILIE enables an SCI interrupt whenever the IDLE flag in SCSR is set. The
interrupt is blocked by negating ILIE.
TE — Transmitter Enable
1 = SCI transmitter enabled, TXD pin dedicated to the SCI transmitter
0 = SCI transmitter disabled, TXD pin may be used as general-purpose I/O
When set, TE enables the SCI transmitter and assigns it to the TXD pin. When TE is
clear, the TXD pin may be used for general-purpose I/O. An idle frame, called a pre-
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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