参数资料
型号: MC68HC11ED0CFN2
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, PQCC44
封装: PLASTIC, LCC-44
文件页数: 88/108页
文件大小: 1672K
代理商: MC68HC11ED0CFN2
Technical Summary
MC68HC11ED0 — Rev. 1.0
Serial Communications Interface (SCI)
Serial Communications Interface (SCI)
OR — Overrun Error Flag
OR is set if a new character is received before a previously received
character is read from SCDR. Clear the OR flag by reading SCSR and
then reading SCDR.
0 = No overrun
1 = Overrun detected
NF — Noise Error Flag
NF is set if majority sample logic detects anything other than a
unanimous decision. Clear NF by reading SCSR and then reading
SCDR.
0 = Unanimous decision
1 = Noise detected
FE — Framing Error Flag
FE is set when a 0 is detected where a stop bit was expected. Clear
the FE flag by reading SCSR and then reading SCDR.
0 = Stop bit detected
1 = Zero detected
Bit 0 — Unimplemented
Always reads 0
7.3.5 Serial Communications Data Register
NOTE:
SCI receive and transmit data are double buffered. Reads of SCDR
access the receive data buffer and writes access the transmit data
buffer.
Address:
$002F
Bit 7
6
54321
Bit 0
Read:
R7/T7
R6/T6
R5/T5
R4/T4
R3/T3
R2/T2
R1/T1
R0/T0
Write:
Reset:
Unaffected by reset
Figure 7-8. Serial Communications Data Register (SCDR)
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For More Information On This Product,
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