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參數(shù)資料
型號: MC68HSC05C8A
廠商: Motorola, Inc.
英文描述: 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述: 8位微控制器單元(MCU)。(8位微控制器)
文件頁數(shù): 76/156頁
文件大小: 755K
代理商: MC68HSC05C8A
L
G
R
Serial Communications Interface (SCI)
General Release Specification
MC68HC05C8A
Rev. 3.0
76
Serial Communications Interface (SCI)
MOTOROLA
9.6.4 SCI Status Register
The SCI status register contains flags to signal the following conditions:
Transfer of SCDR data to transmit shift register complete
Transmission complete
Transfer of receive shift register data to SCDR complete
Receiver input idle
Receiver overrun
Noisy data
Framing error
TDRE — Transmit Data Register Empty
This clearable, read-only bit is set when the data in the SCDR
transfers to the transmit shift register. TDRE generates an interrupt
request if the TIE bit in SCCR2 is also set. Clear the TDRE bit by
reading the SCSR with TDRE set, and then writing to the SCDR.
Reset sets the TDRE bit. Software must initialize the TDRE bit to logic
zero to avoid an instant interrupt request when turning on the
transmitter.
1 = SCDR data transferred to transmit shift register
0 = SCDR data not transferred to transmit shift register
TC — Transmission Complete
This clearable, read-only bit is set when the TDRE bit is set, and no
data, preamble, or break character is being transmitted. TC generates
an interrupt request if the TCIE bit in SCCR2 is also set. Clear the TC
Address:
$0010
Bit 7
6
5
4
3
2
1
Bit 0
Read:
TDRE
TC
RDRF
IDLE
OR
NF
FE
0
Write:
Reset:
0
0
0
0
0
0
0
0
Figure 9-7. SCI Status Register (SCSR)
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