OPERATIONAL MODES Figure 16. Bus State Repo" />
參數(shù)資料
型號(hào)： MC33889BDW
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 30/59頁(yè)
文件大?。?/td> 0K
描述： IC SYSTEM BASE W/CAN 28-SOIC
標(biāo)準(zhǔn)包裝： 1
控制器類型： 系統(tǒng)基礎(chǔ)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(yīng)商設(shè)備封裝： 28-SOIC W
包裝： 管件
Analog Integrated Circuit Device Data
36
Freescale Semiconductor
33889
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Figure 16. Bus State Report of the CAN Interface Wake-up Comparator on CANL and CANH
The following table summarizes the device behavior when a CAN Wake-up event occurs.
Table 6. Summary of RX Pin Operations for Wake-up Signaling
SBC mode
CAN state
MC33889B
MC33889D
Normal
TermVBAT
no event on RX, no bit set
RX pulse (1), bit CANWU is not set
Standby
TermVBAT
no event on RX, no bit set
RX pulse (1), bit CANWU is not set
Sleep
TermVBAT
SBC mode transition to Normal request, bit CANWU set SBC mode transition to Normal request, bit CANWU set
Stop
TermVBAT
INT pulse, bit CANWU set
Int pulse, bit CANWU set
Notes
29.
pulse duration is bus dominant duration minus tWAKE.
Rx
CANL
CANH
Dominant
Recessive
state
CANL terminated to VBAT
Dominant
Recessive
state
Other CAN node send
tWAKE
CAN in TxRx
MC33889D in Normal mode
CAN in TermVBAT
MC33889D in Normal mode, Standby mode or in stop mode
CAN in TxRx
MC33889D in Normal mode
Dominant state
tWAKE
Tx sender node
Rx MC33889D
tRX_DOM
tBUS_DOM
tWAKE: duration of the CAN wake up filter, typ 16 s. The MC33889D Rx dominant low level duration is the difference
between the duration of the bus minus the tWAKE, as illustrated below (tRX_DOM = tBUS_DOM - tWAKE)
Example: A dominant duration at the bus level of 5
bits of 8us each results in a 40
s bus dominant.
This results in a 24
s (40 s -16 s) dominant level
at Rx of MC33889D (while the CAN of the
MC33889D is in TermVBAT).
Tx MC33889D
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