參數(shù)資料
型號(hào)： UJA1065
廠商： NXP Semiconductors N.V.
英文描述： High-speed CAN/LIN fail-safe system basis chip
中文描述： 高速的CAN / LIN故障防護(hù)系統(tǒng)基礎(chǔ)芯片
文件頁(yè)數(shù)： 13/67頁(yè)
文件大?。?/td> 285K
代理商： UJA1065
9397 750 14409
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Objective data sheet
Rev. 01 — 10 August 2005
13 of 67
Philips Semiconductors
UJA1065
High-speed CAN/LIN fail-safe system basis chip
6.4.1
Watchdog start-up behavior
Following any reset event the watchdog is used to monitor the ECU start-up procedure. It
observes the behavior of the RSTN pin for any clamping condition or interrupted reset
wire. In case the watchdog is not properly served within t
WD(init)
, another reset is forced
and the monitoring procedure is restarted. In case the watchdog is again not properly
served, the system enters Fail-safe mode (see also
Figure 3
, Startup and Restart mode).
6.4.2
Watchdog window behavior
Whenever the SBC enters Normal mode, the window mode of the watchdog is activated.
This ensures that the microcontroller operates within the required speed; a too fast as well
as a too slow operation will be detected. Watchdog triggering using the Window mode is
illustrated in
Figure 4
.
The SBC provides 10 different period timings, scalable with a 4 factor watchdog prescaler.
The period can be changed within any valid trigger window. Whenever the watchdog is
triggered within the window time, the timer will be reset to start a new period.
The watchdog window is defined to be between 50 % and 100 % of the nominal
programmed watchdog period. Any too early or too late watchdog access or wrong Mode
register code access will result in an immediate system reset, entering Start-up mode.
6.4.3
Watchdog time-out behavior
Whenever the SBC operates in Standby mode, in Sleep mode or in Flash mode, the active
watchdog operates in Time-out mode. The watchdog has to be triggered within the actual
programmed period time; see
Figure 5
. The Time-out mode can be used to provide cyclic
wake-up events to the host microcontroller from Standby and Sleep mode.
Fig 4.
Watchdog triggering using Window mode
mce626
trigger window
trigger
window
too early
trigger
restarts
period
50 %
trigger
via SPI
trigger
via SPI
last
trigger point
earliest possible
trigger point
latest possible
trigger point
earliest
possible
trigger
point
latest
possible
trigger
point
too early
trigger restarts period
(with different duration if
desired)
period
100 %
50 %
100 %
new period
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UJA1065TW 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:High-speed CAN/LIN fail-safe system basis chip
UJA1065TW/3V0 功能描述:網(wǎng)絡(luò)控制器與處理器 IC HI SPEED CAN SYSTEM 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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
UJA1065TW/3V0,512 功能描述:CAN 接口集成電路 HI SPEED CAN SYSTEM RoHS:否 制造商:Texas Instruments 類型:Transceivers 工作電源電壓:5 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:SOIC-8 封裝:Tube
UJA1065TW/3V0,518 功能描述:網(wǎng)絡(luò)控制器與處理器 IC HI SPEED CAN SYSTEM 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(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
UJA1065TW/3V0512 制造商:NXP Semiconductors 功能描述:CONTROLLER SYS CAN/LIN 3V 32HTSSOP
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