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参数资料
型号： MC68LNC705C9ACFN
厂商： FREESCALE SEMICONDUCTOR INC
元件分类： 微控制器/微处理器
英文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC44
封装： PLASTIC, LCC-44
文件页数： 3/177页
文件大小： 1941K
代理商： MC68LNC705C9ACFN
Serial Communications Interface (SCI)
Advance Information
MC68HC705C9A — Rev. 4.0
100
Serial Communications Interface (SCI)
MOTOROLA
IDLE — Receiver Idle Flag
This clearable, read-only flag is set when 10 or 11 consecutive logic
1s appear on the receiver input. IDLE generates an interrupt request
if the ILIE bit in the SCCR2 is also set. Clear the ILIE bit by reading
the SCSR with IDLE set and then reading the SCDR.
1 = Receiver input idle
0 = Receiver input not idle
OR — Receiver Overrun Flag
This clearable, read-only flag is set if the SCDR is not read before the
receive shift register receives the next word. OR generates an
interrupt request if the RIE bit in the SCCR2 is also set. The data in
the shift register is lost, but the data already in the SCDR is not
affected. Clear the OR bit by reading the SCSR with OR set and then
reading the SCDR.
1 = Receive shift register full and RDRF = 1
0 = No receiver overrun
NF — Receiver Noise Flag
This clearable, read-only flag is set when noise is detected in data
received in the SCI data register. Clear the NF bit by reading the
SCSR and then reading the SCDR.
1 = Noise detected in SCDR
0 = No noise detected in SCDR
FE — Receiver Framing Error Flag
This clearable, read-only flag is set when there is a logic 0 where a
stop bit should be in the character shifted into the receive shift
register. If the received word causes both a framing error and an
overrun error, the OR flag is set and the FE flag is not set. Clear the
FE bit by reading the SCSR and then reading the SCDR.
1 = Framing error
0 = No framing error
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