参数资料
型号: MC68HC05V7CB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56
封装: SDIP-56
文件页数: 47/170页
文件大小: 980K
代理商: MC68HC05V7CB
MOTOROLA
SECTION 15: MESSAGE DATA LINK CONTROLLER
Page 126
MC68HC05V7 Specification Rev. 1.0
15.6.2
MUX INTERFACE SIGNALS
There are five signals which pass between the Physical Interface and the MUX Interface
section of the MDLC as shown in Figure 15-16:
These signals are now described.
15.6.2.1
Sleep/Wake
This input signal is used to control the power consumption of the Physical Interface
transmitter.
When driven high by the MUX interface, the transmitter will enter a low power consumption
Sleep mode. This will happen whenever the CPU executes a STOP or WAIT instruction.
The transmitter is not capable of transmitting while it is in the Sleep mode.
When driven low by the MUX interface, the transmitter will ’wake-up’ and become capable
of transmitting messages. This will happen when the MDLC enters the Run mode.
15.6.2.2
Wake
This input signal is used to exit the low power consumption mode of the Physical Interface
transmitter.
The MUX interface will drive this signal high and then low to notify the transmitter to wake
up from Sleep mode.
This will happen whenever the transmitter is in the Sleep mode and a passive to active
transition occurs on the J1850 bus, causing the RxP signal to transition from low to high.
15.6.2.3
Prst
This is the reset signal input to the Physical Interface.
This signal is normally low and the MUX Interface will drive this signal high to reset the
Physical Interface control circuits.
15.6.2.4
Txp
This input signal represents the digital serial transmit data from the MUX Interface to the
Physical Interface.
When sending a passive phase, this signal will be driven low.
When sending an active phase, this signal will be driven high.
15.6.2.5
Rxp
This output signal represents the digital serial receive data from the Physical Interface to
the MUX Interface.
When receiving an active phase, this signal will be driven high.
When receiving a passive phase this signal will be driven low.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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