SUPPLEMENTAL APPLICATION NOTES LX Wakes up SBC fro" />
參數(shù)資料
型號: MC33989DWR2
廠商: Freescale Semiconductor
文件頁數(shù): 42/72頁
文件大?。?/td> 0K
描述: IC SYSTEM BASE W/CAN 28-SOIC
標準包裝: 1
控制器類型: 系統(tǒng)基礎芯片
接口: CAN
電源電壓: 5.5 V ~ 18 V
電流 - 電源: 45mA
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
供應商設備封裝: 28-SOIC W
包裝: 剪切帶 (CT)
配用: KIT33989DWEVB-ND - KIT EVAL 33989DW HS SBC
其它名稱: MC33989DWR2CT
Analog Integrated Circuit Device Data
Freescale Semiconductor
47
33989
TYPICAL APPLICATIONS
SUPPLEMENTAL APPLICATION NOTES
LX Wakes up SBC from Sleep Mode
Below is the case where the SBC is in sleep mode and is awaked by LX positive edge.
Figure 26. SBC in Sleep Mode
T1 (LX high level to VDD1 turn on): typ 100 s.
T2: VDD1 rising time is dependent on the capacitor and the load connected to VDD1. It can be approximated by the capacitor
charging time with the regulator output current limitation: T2 = (C x U)/I. With C = 100 mF, IDD1 = 200 mA min., U = 5.0 V
so T2 = 2.5 ms).
T3 (VDD1>RST-TH (4.6 V by default) to reset high): parameter Rest dur: 4.0 ms max.
The total time is 6.6 ms in this example.
CAN Wake-up
The following case describes the signal for CAN wake-up. Refer to page 53 for more details on CAN wake-up signals and the
TCAN analysis.
Figure 27. CAN Wake-up
T1(third valid CAN dominant pulse to VDD1 turn on): typ 80 s.
T2 and T3 identical to page 42 above
The total time is 6.58 ms in this example.
LX with Cyclic Sense
The case below is a description of the wake-up by LX input associated with the cyclic sense function.
Figure 28. Wake-up by LX Input
LX
VDD1
RST
t1
t3
t2
CAN
VDD1
RESET
t1
t2
t3
tCAN
RST
LX
VDD1
RESET
t2
t1
HS1
t3
t4
RST
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