參數(shù)資料
型號: 33742S
廠商: Motorola, Inc.
元件分類: CAN
英文描述: System Basis Chip (SBC) with Enhanced High-Speed CAN Transceiver
中文描述: 系統(tǒng)基礎(chǔ)芯片的增強(qiáng)型(SBC)的高速CAN收發(fā)器
文件頁數(shù): 32/52頁
文件大?。?/td> 1087K
代理商: 33742S
33742
32
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
CAN in Sleep Mode with Wake-Up Enable
When the CAN interface is in Sleep mode with wake up
enable, the CAN bus traffic is detected. The CAN bus wake up
is a pattern wake up.
Pattern Wake-Up
In order to wake up the CAN interface, the following criteria
must be fulfilled:
The CAN interface wake-up receiver must receive a
series of three consecutive valid dominant pulses, each of
them has to be longer than 500 ns and shorter than
500
μ
s.
The distance between 2 pulses must be lower than
500
μ
s.
The three pulses must occur within a time frame of 1.0 ms.
The pattern wake-up of the 33742 CAN interface allow wake-up
by any CAN message content.
Figure 19
below illustrates the CAN signals during a CAN
bus Sleep state and wake-up sequence.
Figure 19. CAN Bus Signal During Can Sleep State and Wake-Up Sequence
CANL
CANH
TXD
RXD
Ground
2.5 V
CANL Dominant
CANH Dominant
CANL/CANH Recessive
CAN in TXRX Mode
CAN in Sleep Mode (Wake-Up Enable)
Incoming CAN Message
CANL Dominant
CANH Dominant
CANL Dominant
CANH Dominant
CANL Dominant
CANH Dominant
WU Receiver
Internal Wake-Up Signal
Min 500 ns
Max 500
μ
s
CAN Bus Sleep State
Pulse # 1
Pulse # 2
Pulse # 3
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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