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| 型号： | MC68HC11ED0VP2 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, 2 MHz, MICROCONTROLLER, PDIP40 |
| 封装： | PLASTIC, DIP-40 |
| 文件页数： | 86/108页 |
| 文件大小： | 1672K |
| 代理商： | MC68HC11ED0VP2 |
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Serial Communications Interface (SCI)
SCI Registers
MC68HC11ED0 — Rev. 1.0
Technical Summary
Serial Communications Interface (SCI)
7.3.4 Serial Communication Status Register
TDRE — Transmit Data Register Empty Flag
This flag is set when SCDR is empty. Clear the TDRE flag by reading
SCSR and then writing to SCDR.
0 = SCDR busy
0 = SCDR empty
TC — Transmit Complete Flag
This flag is set when the transmitter is idle (no data, preamble, or
break transmission in progress). Clear the TC flag by reading SCSR
and then writing to SCDR.
0 = Transmitter busy
1 = Transmitter idle
RDRF — Receive Data Register Full Flag
This flag is set if a received character is ready to be read from SCDR.
Clear the RDRF flag by reading SCSR and then reading SCDR.
0 = SCDR empty
1 = SCDR full
IDLE — Idle Line Detected Flag
This flag is set if the RxD line is idle. Once cleared, IDLE is not set
again until the RxD line has been active and becomes idle again. The
IDLE flag is inhibited when RWU = 1. Clear IDLE by reading SCSR
and then reading SCDR.
0 = RxD line active
1 = RxD line idle
Address:
$002E
Bit 7
6
54321
Bit 0
Read:
TDRE
TC
RDRF
IDLE
OR
NF
FE
Write:
Reset:
11
000000
= Unimplemented
Figure 7-7. Serial Communications Status Register (SCSR)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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| MC68HC11ED0VP3 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Technical Summary |
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