- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359133 > MC33889 (飛思卡爾半導體(中國)有限公司) System Basis Chip (SBC) with Low Speed Fault Tolerant CAN Interface PDF資料下載
參數(shù)資料
| 型號： | MC33889 |
| 廠商： | 飛思卡爾半導體(中國)有限公司 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | System Basis Chip (SBC) with Low Speed Fault Tolerant CAN Interface |
| 中文描述： | 帶有低速CAN的精簡版系統(tǒng)基礎芯片 |
| 文件頁數(shù)： | 15/30頁 |
| 文件大?。?/td> | 464K |
| 代理商： | MC33889 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁當前第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁
PC33889
15
PC33889
Figure 5. Reset and Wdogb function diagram
The Wdogb output pin is a push pull structure than can drive external component of the application in order for instance to sig-
nal MCU wrong operation. Even if it is internally turned on (low sate) the reset pins can be forced to 5V at 25°C only, thanks to
its internal limited current drive capability. Wdogb stays low until the Watchdog register is properly addressed through SPI.
4.16
Debug mode Application hardware and software debug with the SBC.
When the SBC is mounted on the same printed circuit board as the micro controller it supplies, both application software and
SBC dedicated routine must be debugged. Following features allow the user to debug the software by allowing the possibility to
disable the SBC internal software watchdog timer.
4.16.1
Device power up, reset pin connected to Vdd1
At SBC power up, the Vdd1 voltage is provided, but if no SPI communication occurs to configure the device, a reset occurs
every 350ms. In order to allow software debug and avoid MCU reset the Reset pin can be connected directly to Vdd1 by a jumper.
4.16.2
Debug modes with software watchdog disabled though SPI (Normal Debug, Standby Debug and Stop Debug)
The software watchdog can be disabled through SPI. In order to avoid unwanted watchdog disable and to limit the risk of
disabling the watchdog during SBC normal operation the watchdog disable has to be done with the following sequence:
Step 1) Power down the SBC
Step 2) Power up the SBC (The BATFAIL bit is set, and the SBC enters normal request mode)
Step 3) Write to TIM1 register to allow SBC to enter Normal mode
Step 4) Write to MCR register with data 0000 (this enables the debug mode). (Complete SPI byte: 000 1 0000)
Step 5) Write to MCR register normal debug (0001 x101), standby debug (0001 x110) or Stop debug (0001 x111)
While in debug mode, the SBC can be used without having to clear the W/D on a regular basis to facilitate software and
hardware debug.
Step 6) To leave the debug mode, write 0000 to MCR register.
To avoid entering debug mode after a power up, first read BATFAIL bit (MCR read) and write 0000 into MCR.
The graph below illustrates the debug mode entering.
Figure 6. Debug mode enter
4.16.3
MCU flash programming configuration
In order to allow the possibility to download software into the application memory (MCU EEPROM or Flash) the SBC allows
the following capabilities: The Vdd1 can be forced by an external power supply to 5V and the reset and Wdogb outputs by
For More Information On This Product,
Go to: www.freescale.com
Reset
WDOGB
Vdd1
SPI
SPI CSB
Watchdog time out
Watchdog register addressed
Watchdog
period
W/D clear
VSup
SPI
MCR(step4)
Batfail
Vdd1
debug mode
MCR (step5)
SPI: read batfail
MCR (step6)
SBC in debug Mode, no W/D
SBC not in debug Mode and W/D on
TIM1(step 3)
F
Freescale Semiconductor, Inc.
n
.
相關PDF資料 |
PDF描述 |
|---|---|
| MC33897 | Single-Wire CAN Transceiver(單線CAN收發(fā)器) |
| MC33972 | Multiple Switch Detection Interface with Suppressed Wake-Up(帶抑制喚醒功能的多開關檢測接口) |
| MC33976 | Dual Gauge Driver with Configurable Response Time(帶可設置響應時間的雙標尺驅(qū)動器) |
| MC33984 | Dual Intelligent High-Current Self-Protected Silicon High-Side Switch (4.0 mOhm)(雙智能大電流帶自保護功能的硅高端開關（4mOhm）) |
| MC33989 | System Basis Chip with High Speed CAN Transceiver(帶高速CAN收發(fā)器的系統(tǒng)基片) |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC33889BDW | 功能描述:網(wǎng)絡控制器與處理器 IC SBC LIGHT PASS 3.3 RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| MC33889BDWR2 | 功能描述:網(wǎng)絡控制器與處理器 IC SBC LIGHT PASS 3.3 RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| MC33889BPEG | 制造商:Freescale Semiconductor 功能描述:SYSTEM BASIS CHIP WITH LOW SPEED FAULT TOLERANT CAN INTERFACE 制造商:Freescale Semiconductor 功能描述:SBC-LITE-LS-CAN - Bulk 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN 28SOIC |
| MC33889BPEGR2 | 制造商:Freescale Semiconductor 功能描述:CAN 125Kbps Sleep/Stop 9V/12V/15V T/R 制造商:Freescale Semiconductor 功能描述:SBC-LITE-LS-CAN - Tape and Reel 制造商:Freescale Semiconductor 功能描述:IC SYSTEM BASIS W/CAN 28SOIC |
| MC33889DDW | 功能描述:網(wǎng)絡控制器與處理器 IC SBC LIGHT REV D RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
發(fā)布緊急采購，3分鐘左右您將得到回復。