參數(shù)資料
型號(hào): MC68HC11E0CP3
廠商: MOTOROLA INC
元件分類(lèi): 微控制器/微處理器
英文描述: 8-BIT, 3 MHz, MICROCONTROLLER, PDIP48
封裝: PLASTIC, DIP-48
文件頁(yè)數(shù): 58/336頁(yè)
文件大?。?/td> 3387K
代理商: MC68HC11E0CP3
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Technical Data
MC68HC11E Family — Rev. 4
150
Serial Communications Interface (SCI)
MOTOROLA
Serial Communications Interface (SCI)
7.6.1 Idle-Line Wakeup
To use the receiver wakeup method, establish a software addressing
scheme to allow the transmitting devices to direct a message to
individual receivers or to groups of receivers. This addressing scheme
can take any form as long as all transmitting and receiving devices are
programmed to understand the same scheme. Because the addressing
information is usually the first frame(s) in a message, receivers that are
not part of the current task do not become burdened with the entire set
of addressing frames. All receivers are awake (RWU = 0) when each
message begins. As soon as a receiver determines that the message is
not intended for it, software sets the RWU bit (RWU = 1), which inhibits
further flag setting until the RxD line goes idle at the end of the message.
As soon as an idle line is detected by receiver logic, hardware
automatically clears the RWU bit so that the first frame of the next
message can be received. This type of receiver wakeup requires a
minimum of one idle-line frame time between messages and no idle time
between frames in a message.
7.6.2 Address-Mark Wakeup
The serial characters in this type of wakeup consist of seven (eight if
M = 1) information bits and an MSB, which indicates an address
character (when set to 1, or mark). The first character of each message
is an addressing character (MSB = 1). All receivers in the system
evaluate this character to determine if the remainder of the message is
directed toward this particular receiver. As soon as a receiver
determines that a message is not intended for it, the receiver activates
the RWU function by using a software write to set the RWU bit. Because
setting RWU inhibits receiver-related flags, there is no further software
overhead for the rest of this message.
When the next message begins, its first character has its MSB set, which
automatically clears the RWU bit and enables normal character
reception. The first character whose MSB is set is also the first character
to be received after wakeup because RWU gets cleared before the stop
bit for that frame is serially received. This type of wakeup allows
messages to include gaps of idle time, unlike the idle-line method, but
相關(guān)PDF資料
PDF描述
MC68HC11E0FU 8-BIT, MICROCONTROLLER, PQFP64
MC68HCP11E1CFU2 8-BIT, 2 MHz, MICROCONTROLLER, PQFP64
MC68HC11E0MFN3 8-BIT, 3 MHz, MICROCONTROLLER, PQCC52
MC68HC11E1FU 8-BIT, MICROCONTROLLER, PQFP64
MC68711KS2MFN3R2 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQCC52
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC11E0FU 制造商:Rochester Electronics LLC 功能描述:8BIT MPU W/O ROM W/O EE - Bulk
MC68HC11E0MB2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-channel, 8-bit analog-to-digital (A/D) converter
MC68HC11E0MFN2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Microcontrollers
MC68HC11E0MFNE2 功能描述:8位微控制器 -MCU 8B MCU 512RAM COP A/D RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
MC68HC11E0VB2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-channel, 8-bit analog-to-digital (A/D) converter