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參數(shù)資料
| 型號： | 33991 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Gauge Driver Integrated Circuit |
| 中文描述： | 儀表驅(qū)動集成電路 |
| 文件頁數(shù)： | 29/36頁 |
| 文件大小： | 660K |
| 代理商： | 33991 |
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MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
33991
29
Over Current Fault Requirements:
Output currents are limited to safe levels, then the device will
rely on Thermal Shutdown to protect itself.
Under Voltage Fault Requirements
Severe under voltage V
PWR
conditions may result in
uncertain pointer positions; therefore, recalibration of the
pointer position may be advisable. During an under voltage
event, the state machine and outputs continues to operate,
although the outputs may be unable to reach the higher voltage
levels. The master is notified of an under voltage event via the
SO pin. Under voltage detection occurs regardless whether the
gauge(s) are enabled, or disabled.
Note:
There is no way to distinguish between over voltage and
undervoltagefaults from the statusbits. If there is noexternalmeans
for the microcontroller to determine the fault type, the gauges should
be routinely enabled following the transition to logic [0] of ST6.
Electrical Requirements
All voltages specified are measured relative to the device
ground pins, unless otherwise noted. Current flowing into
33991is positive, while current flowing out of the device is
negative.
Resets (Sleep Mode)
The device can reset internally or externally. If the V
DD
level
falls below the V
DDUV
level, specified in the
Static Electrical
Characteristics
, the device resets and powers up in the Default
mode. Similarly, If the RST pin is driven to a logic [0], the device
will reset to its default state. The device will consume the least
amount of current (
Idd
and
Ipwr
) when the RST pin is logic [0].
This is also referred to as the Sleep mode.
APPLICATION INFORMATION
The 33991is an extremely versatile device, used in a variety
of applications. Table 15, and the following sample code,
provides a step-by-step example of configuring using many of
the features designed into the IC. This example is intended to
give a generic overview of how the device could be used.
Further, it is intended to familiarize users with some of its
capabilities. In Steps 1-9, the gauges are enabled, the clock is
calibrated, the device is configured for RTZ, and the pointers
are calibrated with the RTZ command. Steps 1-9 are
representative of the first steps after power-up. Maximum
velocity is set in Step 10, if necessary. In Steps 11 and 12,
pointersarecommandedtothedesiredpositionsbythemaster.
These steps are the most frequently used during normal
operation. Steps 13 -15 place the pointer close to the zero
position prior to the initiation of the RTZ commands in Steps 16-
19. Step 20 disables the gauges, placing them into a Low
Quiescent Current mode.
Table 15. GDIC SETUP, CONFIGURATION, & USAGE EXAMPLE
Step
Number
Command
Description
Table/Figure
Number
1
PECR
a. Enable Gauges.
- Bit PE0: Gauge 0.
- Bit PE1: Gauge 1.
Table 3
Figure 7
b. Clock Calibration
- Bit PE3: enables calibration procedure.
- Bit PE4: set clock f =1 MHz maximum or nominal.
Send 8 μs pulse on CS to calibrate 1 MHz clock.
2
RTZCR
Set RTZ Full Step Time
- Bits RC3:RC0.
Tables 9-10
Set RTZ Blanking Time
- Bit RC4.
Tables 9-10
Preload RTZ Accumulator.
- Bits RC12:RC5.
Table 11
Check SO for an Out of Range Clock Calibration.
- Is bit ST7 logic level 1 If so, repeat Steps 1 and 2.
Table 12
3
POS0R
a. Move pointer to position 24 prior to RTZ.
Table 5
F
Freescale Semiconductor, Inc.
Go to: www.freescale.com
n
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 33-991 | 制造商:Ideal Industries Inc 功能描述:LTKII,350MHZ,CAT6 W/CAT6 ADPT |
| 3399-1 | 制造商:3M 功能描述:3399-1 |
| 33992 | 制造商:Ideal Industries Inc 功能描述:LTKII500MHZ,CAT6A W/CAT6A ADPT |
| 33992510000001 | 功能描述:電纜組件 CABLE KIT RoHS:否 制造商:Molex 產(chǎn)品:Power Assemblies 類型:Cable Assembly 連接器端口 A:No Connector 連接器端口 A 管腳計數(shù):4 連接器端口 B:No Connector 連接器端口 B 管腳計數(shù): 型式:Male 線規(guī) - 美國線規(guī)（AWG）:20, 28 長度:0.305 m 顏色:Black, Red |
| 33993 | 制造商:Ideal Industries Inc 功能描述:LTKII1000MHZ,CAT7A W/CAT6AADPT |
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