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| 型号： | MCZ33991EGR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 28/36页 |
| 文件大小： | 0K |
| 描述： | IC GAUGE DRIVER SPI 24-SOIC |
| 标准包装： | 1,000 |
| 应用： | 步进电机驱动器，2 相 |
| 输出数： | 2 |
| 电流 - 输出： | 100mA |
| 电源电压： | 6.5 V ~ 26 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 带卷 (TR) |
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TIMING DESCRIPTIONS AND DIAGRAMS
APPLICATION INFORMATION
Table 18. 33991 Setup, Configuration, & Usage Example
Step #
Command
Description
Reference
Figure #
1
PECR
a.
Enable Gauges.
Table 3
- Bit PE0: Gauge 0.
- Bit PE1: Gauge 1.
b.
Clock Calibration.
Figure 7
- Bit PE3: Enables Calibration Procedure.
- Bit PE4: Set clock f =1 MHz maximum or nominal.
Send 8 μ s pulse on CS to calibrate 1 MHz clock.
2
RTZCR
Set RTZ Full Step Time.
Tables 9-10
- Bits RC3:RC0.
Set RTZ Blanking Time.
- Bit RC4.
Preload RTZ Accumulator.
- Bits RC12:RC5.
Check SO for an Out-of-Range Clock Calibration
- Is bit ST7 logic 1? If so, then repeat Steps 1 and 2.
Tables 9-10
Table 11
Table 12
3
POS0R
a.
Move pointer to position 24 prior to RTZ
Table 5
4
POS1R
Move pointer to position 24 prior to RTZ.
Check SO to see if gauge 0 has moved.
Table 6
Table 12
- Is bit ST4 logic 1? If so then the gauge 0 has moved to the first microstep.
5
PECR
Send null command to see if gauges have moved.
Table 3
- Bits PE12.
Check SO to see if Gauge 0 (Gauge 1) has moved.
- Bit ST4 (ST5) logic1? If so, then gauge 0 (Gauge 1) has moved another microstep.
Keep track of movement and if 24 steps are finished, and both gauges are at a static
position, then RTZ. Otherwise repeat steps a) and b).
Table 12
6
RTZ
a. Return one gauge at a time to the zero stop using
RTZ command Bit RZ0 selects the gauge Bit RZ1 is used to enable or disable an
RTZ.
- Bits RZ3:RZ2 are used to select the RTZ accumulator bits that will clock out on the
SO pin.
b. Select the RTZ accumulator bits that will clock
out on the SO bits ST15:ST8. These will be used if characterizing the RTZ.
- Bits RZ3:RZ2 are used to select the bits.
Table 7
Table 8
7
PECR
a. Check the Status of the RTZ by sending the null
Table 3
command to monitor SO bit ST2.
- Bit PE12 is the null command.
Is ST2 logic 0? If not then gauge 0 still returning and null command should be resent.
Table 12
8
RTZ
Return the other gauge to the zero stop. If the second gauge is driving a different
Tables 7-8
pointer than the first, then a new RTZCR command may be required to change the
Full Step time.
9
PECR
a.
Check the Status of the RTZ by sending the null
Table 3
command to monitor SO bit ST3
- Bit PE12 is the null command.
Is ST3 logic 0? If not then gauge 1 still returning and null command should be resent.
Table 12
33991
Analog Integrated Circuit Device Data
28
Freescale Semiconductor
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