BEHAVIOR AT POWER UP AND POWER DOWN SAFE Mode A" />
參數(shù)資料
型號(hào): MCZ33905BD3EK
廠商: Freescale Semiconductor
文件頁數(shù): 56/106頁
文件大?。?/td> 0K
描述: IC SBC CAN HS 3.3V 54SOIC
標(biāo)準(zhǔn)包裝: 26
應(yīng)用: 系統(tǒng)基礎(chǔ)芯片
接口: CAN,LIN
電源電壓: 5.5 V ~ 28 V
封裝/外殼: 54-SSOP(0.295",7.50mm 寬)裸露焊盤
供應(yīng)商設(shè)備封裝: 54-SOICW-EP
包裝: 管件
安裝類型: 表面貼裝
Analog Integrated Circuit Device Data
Freescale Semiconductor
53
33903/4/5
FAIL-SAFE OPERATION
BEHAVIOR AT POWER UP AND POWER DOWN
SAFE Mode A Illustration
Figure 31 illustrates the event and consequences when SAFE mode A is selected via the appropriate debug resistor or SPI
configuration.
Figure 31. SAFE Mode A Behavior Illustration
RST
VDD
failure event, i.e. watchdog
SAFE
OFF state ON state
8 x 256 ms delay time to enter in SAFE mode
VDD
RST
SAFE
to evaluate resistor at DBG pin
and monitor ECU external events
1st
8th
2nd
Behavior Illustration for Safe State A (RDG < 6.0 kohm), or Selection by the SPI
step 1: Failure illustration
RST
VDD
failure event, VDD low
SAFE
OFF state ON state
100 ms delay time to enter in SAFE mode
to evaluate resistor at DBG pin
and monitor ECU external events
VDD_UV TH
100ms
VDD
RST
SAFE
VDD < VDD_UV TH
GND
RST
VDD
failure event, Reset s/c GND
SAFE
OFF state
ON state
100 ms deglitcher time to activate SAFE and
enter in SAFE mode to evaluate resistor at the DBG pin
and monitor ECU external events
2.5 V
100ms
VDD
RST
SAFE
step 2: Consequence on
VDD, RST and SAFE
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