參數(shù)資料
型號： MC68HC705V8CFU
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP64
封裝： QFP-64
文件頁數(shù)： 14/172頁
文件大?。?/td> 890K
代理商： MC68HC705V8CFU
SECTION 15: MESSAGE DATA LINK CONTROLLER
MOTOROLA
Page 99
MC68HC705V8 Specification Rev. 2.1
15.1.1
MDLC OPERATING MODES
The MDLC has five main modes of operation which interact with the power supplies, pins
and rest of the MCU as shown below.
15.1.2
MODE DESCRIPTIONS
15.1.2.1
Power Off
This mode is entered from the Reset mode whenever the MCU supply voltage VDD drops
below the minimum specified value to guarantee correct MDLC operation. In order to
ensure that the MDLC does not enter an unknown state, it will first be placed in the Reset
mode before being powered down. In this mode, the pin input and output specifications are
not guaranteed.
VDD > Vmdlc(Min.) and
Power Off
Figure 15-1:
MDLC Operating Modes State Diagram
Reset
MDLC Stop
Run
VDD ≤ Vmdlc(Min.)
STOP instruction or
(from any mode)
MDLC Wait
RXMS=1 or
(WAIT instruction and WCM=1)
(WAIT instruction and WCM=0)
Any MCU reset source asserted
No MCU reset source asserted
Any MCU reset source asserted
Network activity or
other MCU wake-up
(COP, ILLADDR, P.U., RESET, LVR, POR
DISABLED STOP)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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