參數(shù)資料
型號(hào)： PC33991DH
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 運(yùn)動(dòng)控制電子
英文描述： STEPPER MOTOR CONTROLLER, PDSO24
封裝： PLASTIC, SOIC-28
文件頁數(shù)： 21/36頁
文件大?。?/td> 660K
代理商： PC33991DH
33991
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
28
Figure 9. Full Steps (CCW)
RTZ Output
The non-driven coil is analyzed determining the state of the
motor during an RTZ event. The 33991multiplexes the coil
voltages and provides the signal from the non-driven coil to the
RTZ pin.
Default Mode
Default mode refers to the state of the 33991after an internal
or external reset and prior to SPI communication. An internal
reset occurs during VDD power-up. An external reset is initiated
by the RST pin driven to a logic [0]. With the exception of the
RTZCR full step time, all of the specific pin functions and internal
registers will operate as though all of the addressable
configuration register bits were set to logic [0]. This means for
example, all of the outputs will be disabled after a power-up or
external reset, SO flag ST6 is set, indicating an under voltage
event. Anytime an external reset is exerted and the default is
restored, all configuration parameters, e.g., clock calibration,
maximum speed, RTZ parameters, etc. are lost and must be
reloaded.
Fault Logic Requirements
The 33991device indicates each of the following faults as
they occur:
Over temperature fault
Out-of-range voltage faults
Clock outofspec
Over current faults are not reported directly. It is likely, however,
an over current condition will become a thermal issue and be
reported.
Over Temperature Fault Requirements
The 33991incorporates over temperature protection
circuitry, shutting off the affected Gauge Driver when excessive
temperatures are measured. In the event of a thermal overload,
the affected gauge driver is automatically disabled. The over
temperature fault is flagged via ST0 and/or ST1. Its respective
flag continues to be set until the affected gauge is successfully
re-enabled, provided the junction temperature has fallen below
the hysteresis level.
Over Voltage Fault Requirements
The device is capable of surviving VPWR voltages within the
maximum specified in the Maximum Ratings table. VPWR levels
resultinginanOver Voltage Shut Down condition canresultin
uncertain pointer positions. Therefore, the pointer position
should be re-calibrated. The master is then notified of an over
voltage event via the ST6 flag on the SO pin. Over voltage
detection and notification occurs regardless of whether the
gauge(s) are enabled or disabled.
Note:
There is no way to distinguish between an over voltage fault
and an under voltage fault from the status bits. If there is no external
means for the microcontroller to determine the fault type, the gauges
should be routinely enabled following the transition to logic [0] of ST6.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PC33991DH/R2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Gauge Driver Integrated Circuit
PC33991FS 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Products PC33991FS Fact Sheet
PC33991R2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Gauge Driver Integrated Circuit
PC33996EK/R2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:16-Output Switch with SPI Control
PC33997 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC
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