OPERATIONAL MODES After a CAN wake-up, a fl" />
參數(shù)資料
型號(hào)： KIT33742DWEVB
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 37/71頁(yè)
文件大?。?/td> 0K
描述： KIT FOR 33742 SBC WITH EHSCAN
標(biāo)準(zhǔn)包裝： 1
主要目的： 接口，CAN 控制器
已用 IC / 零件： MC33742
相關(guān)產(chǎn)品： MC33742DW-ND - IC SYSTEM BASE W/LIN 28-SOIC
MC33742DWR2-ND - IC SYSTEM BASE W/LIN 28-SOIC
MC33742SDW-ND - IC SYSTEM BASE W/LIN 28-SOIC
MC33742SDWR2-ND - IC SYSTEM BASE W/LIN 28-SOIC
Analog Integrated Circuit Device Data
42
Freescale Semiconductor
33742
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
After a CAN wake-up, a flag is set in the CAN register. Bit CANWU reports the CAN wake-up event while the 33742 was in
Sleep or Stop mode. This bit is set until the CAN is in placed by SPI command into TXRX mode and the CAN register can be read.
CAN BUS DIAGNOSTIC
The SBC can diagnose CANH or CANL lines short to GND, shorts to VSUP or VDD.
As illustrated in Figure 24, several single-ended comparators are implemented on the CANH and CANL bus lines. These
comparators monitor the bus voltage level in the recessive and dominant states. This information is then managed by a logic
circuit to determine if a failure has occurred and to report it. Table 11 indicates the state of the comparators in the event of bus
failure and the state of the drivers; that is, whether they are recessive or dominant.
Figure 24. CAN Bus Simplified Structure
DETECTION PRINCIPLE
In the recessive state, if one of the two bus lines is shorted to GND, VDD, or VSUP, then voltage at the other line follows the
shorted line due to bus termination resistance and the high-impedance of the driver. For example, if CANL is shorted to GND,
CANL voltage is zero, and CANH voltage, as measured by the Hg comparator, is also close to zero.
Table 11. Short to GND, Short to VSUP, and Short to 5.0 V (VDD) Detection Truth Table
Failure Description
Driver Recessive State
Driver Dominant State
Lg (Threshold 1.75 V)
Hg (Threshold 1.75 V)
Lg (Threshold 1.75 V)
Hg (Threshold 1.75 V)
No failure
1
0
1
CANL to GND
0
1
CANH to GND
0
Lb (Threshold VSUP-2.0 V) Hb (Threshold VSUP-2.0 V) Lb (Threshold VSUP-2.0 V) Hb (Threshold VSUP-2.0 V)
No failure
0
CANL to VSUP
1
CANH to VSUP
1
0
1
L5 (Threshold VDD-0.43 V) H5 (Threshold VDD-0.43 V) L5 (Threshold VDD-0.43 V)
H5
(Threshold VDD-0.43 V)
No failure
0
CANL to VDD
1
CANH to VDD
1
0
1
Hg
CANH
CANL
Lg
VDD
VRG
Hb
VRVB
Lb
VRVB
Logic
TXD
Diagnostic
VDD (5.0 V)
GND (0.0 V)
Recessive Level (2.5 V)
VSUP (12V–14 V)
VRVB (VSUP -2.0 V)
VRG (1.75 V)
CANL Dominant Level (1.4 V)
CANH Dominant Level (3.6 V)
L5
VR5
H5
VR5
VR5 (VDD -0.43 V)
相關(guān)PDF資料
PDF描述
EGM12DTBS-S189 CONN EDGECARD 24POS R/A .156 SLD
EBM28DTBS-S189 CONN EDGECARD 56POS R/A .156 SLD
ESM12DTAS-S189 CONN EDGECARD 24POS R/A .156 SLD
EGM12DTAS-S189 CONN EDGECARD 24POS R/A .156 SLD
EBM28DTAS-S189 CONN EDGECARD 56POS R/A .156 SLD
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
KIT3376MMA7330L 功能描述:加速傳感器開發(fā)工具 XYZ-AXIS ANALOG ACCELERO RoHS:否 制造商:Murata 工具用于評(píng)估:SCA3100-D04 加速:2 g 傳感軸:Triple Axis 接口類型:SPI 工作電壓:3.3 V
KIT3376MMA7331L 功能描述:加速傳感器開發(fā)工具 3-AXIS ANALOG OUT 4g /12g Dev Kit RoHS:否 制造商:Murata 工具用于評(píng)估:SCA3100-D04 加速:2 g 傳感軸:Triple Axis 接口類型:SPI 工作電壓:3.3 V
KIT3376MMA7331LC 功能描述:加速傳感器開發(fā)工具 3AXIS Angl Accelero Eval Kit RoHS:否 制造商:Murata 工具用于評(píng)估:SCA3100-D04 加速:2 g 傳感軸:Triple Axis 接口類型:SPI 工作電壓:3.3 V
KIT3376MMA7340L 功能描述:加速傳感器開發(fā)工具 XYZ-AXIS ANALOG ACCELERO RoHS:否 制造商:Murata 工具用于評(píng)估:SCA3100-D04 加速:2 g 傳感軸:Triple Axis 接口類型:SPI 工作電壓:3.3 V
KIT3376MMA7341L 功能描述:加速傳感器開發(fā)工具 3-AXIS ANALOG OUT 3g /11g Dev Kit RoHS:否 制造商:Murata 工具用于評(píng)估:SCA3100-D04 加速:2 g 傳感軸:Triple Axis 接口類型:SPI 工作電壓:3.3 V
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*