欧美成人免费电影,国产欧美一区二区三区精品酒店,精品国产a毛片,色网在线免费观看

參數資料
型號: MC68CK338
廠商: Motorola, Inc.
元件分類: 32位微控制器
英文描述: Highly Integrated, Low-Power, 32-Bit Microcontroller
中文描述: 高度集成,低功耗,32位微控制器
文件頁數: 76/133頁
文件大小: 798K
代理商: MC68CK338
MOTOROLA
76
MC68CK338
MC68CK338TS/D
SCSR contains flags that show SCI operational conditions. These flags can be cleared either by hard-
ware or by a special acknowledgment sequence. The sequence consists of SCSR read with flags set,
followed by SCDR read (write in the case of TDRE and TC). A long-word read can consecutively access
both SCSR and SCDR. This action clears receive status flag bits that were set at the time of the read,
but does not clear TDRE or TC flags.
If an internal SCI signal for setting a status bit comes after the CPU has read the asserted status bits,
but before the CPU has written or read register SCDR, the newly set status bit is not cleared. SCSR
must be read again with the bit set. Also, SCDR must be written or read before the status bit is cleared.
Reading either byte of SCSR causes all 16 bits to be accessed. Any status bit already set in either byte
will be cleared on a subsequent read or write of register SCDR.
TDRE — Transmit Data Register Empty Flag
0 = Register TDR still contains data to be sent to the transmit serial shifter.
1 = A new character can now be written to the transmit data register.
TDRE is set when the byte in the transmit data register is transferred to the transmit serial shifter. If
TDRE is zero, transfer has not occurred and a write to the transmit data register will overwrite the pre-
vious value. New data is not transmitted if the transmit data register is written without first clearing
TDRE.
TC — Transmit Complete Flag
0 = SCI transmitter is busy
1 = SCI transmitter is idle
TC is set when the transmitter finishes shifting out all data, queued preambles (mark/idle line), or
queued breaks (logic zero). The interrupt can be cleared by reading SCSR when TC is set and then by
writing the transmit data register of SCDR.
RDRF — Receive Data Register Full Flag
0 = Receive data register is empty or contains previously read data.
1 = Receive data register contains new data.
RDRF is set when the content of the receive serial shifter is transferred to the receive data register. If
one or more errors are detected in the received word, flag(s) NF, FE, and/or PF are set within the same
clock cycle.
RAF — Receiver Active Flag
0 = SCI receiver is idle
1 = SCI receiver is busy
RAF indicates whether the SCI receiver is busy. It is set when the receiver detects a possible start bit
and is cleared when the chosen type of idle line is detected. RAF can be used to reduce collisions in
systems with multiple masters.
IDLE — Idle-Line Detected Flag
0 = SCI receiver did not detect an idle-line condition.
1 = SCI receiver detected an idle-line condition.
IDLE is disabled when RWU in SCCR1 is set. IDLE is set when the SCI receiver detects the idle-line
condition specified by ILT in SCCR1. If cleared, IDLE will not set again until after RDRF is set. RDRF
is set when a break is received, so that a subsequent idle line can be detected.
OR — Overrun Error Flag
0 = RDRF is cleared before new data arrives.
1 = RDRF is not cleared before new data arrives.
OR is set when a new byte is ready to be transferred from the receive serial shifter to the receive data
register, and RDRF is still set. Data transfer is inhibited until OR is cleared. Previous data in receive
data register remains valid, but data received during overrun condition (including the byte that set OR)
is lost.
相關PDF資料
PDF描述
MC68EC060 32-Bit Microprocessors.(32位微處理器)
MC68EN360RC25V QUad Integrated Communications Controller Users Manual
MC68EN360CFE25 QUad Integrated Communications Controller Users Manual
MC68EN360FE25 AC 4C 4#12 PIN PLUG 023
MC68EN360FE25V QUad Integrated Communications Controller Users Manual
相關代理商/技術參數
參數描述
MC68CK338CPV14 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68CK338CPV14B1 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:32-Bit Modular Microcontroller
MC68CM16Z1 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series
MC68CM16Z1CFC16 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series
MC68CM16Z1CPV16 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series
主站蜘蛛池模板: 嘉义市| 汝南县| 襄垣县| 长泰县| 瑞丽市| 浦东新区| 岳阳市| 梓潼县| 揭阳市| 崇阳县| 北安市| 东丰县| 兴海县| 杂多县| 修水县| 安泽县| 从化市| 永新县| 岳阳市| 越西县| 太谷县| 鹤峰县| 工布江达县| 辽宁省| 南乐县| 金堂县| 盐山县| 疏勒县| 五台县| 秀山| 沙湾县| 黑龙江省| 遂昌县| 黎川县| 临西县| 德格县| 南召县| 肇东市| 仁怀市| 泽州县| 麦盖提县|