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| 型号： | MCZ33991EGR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 29/36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 (continued)
Step #
10
Command
VELR
Description
Change the maximum velocity of the Gauge bits V8:V9 determine which gauge(s)
Reference
Figure #
Table 4
will change the maximum velocity bits V7:V0 determine the maximum velocity
position from the acceleration table.
11
POS0R
Position Gauge 0 pointer
Table 5
- Bits P0 11: P0 0: Desired Pointer Position
Check SO for Out of Range V PWR
- Bit ST6 logic 1? If so, then RTZ after valid V PWR
Check SO for over temperature bit ST0 logic 1? If so, then enable driver again. If ST0
continues to indicate over temperature, shut down Gauge 0.
If ST2 returns to normal, then reestablish the zero reference by RTZ command.
Table 12
12
POS1R
Position Gauge 1 pointer
Table 6
- Bits P1 11:P1 0: Desired Pointer Position.
Check SO for Out-of-Range V PWR bit ST6 logic 1? If so, then RTZ after valid V PWR .
Check SO for Over temperature bit ST1 logic 1? If so, then enable driver again. If
ST1 continues to indicate over temperature, then shut down Gauge 1. If ST1 returns
to normal, re-establish the zero reference by RTZ command.
Table 12
13
POS0R
a.
Return the pointers close to zero position using
Table 5
POS0R.
b. Move pointer position at least 24 microsteps CW
to the nearest full step prior to RTZ.
14
POS1R
Return the pointers close to zero position using POS1R.
Table 6
Move pointer position at least 24 microsteps CW to the nearest full step position prior
to RTZ.
Check SO to see if Gauge 0 has moved.
- Bit ST4 logic 1? If so then the gauge 0 has moved to the first microstep.
Table 12
15
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 12 steps are finished, and both gauges are at a static
position, then RTZ. Otherwise repeat steps a) and b).
Table 12
16
RTZ
a.
using
Return one Gauge at a time to the zero stop
Tables 7-8
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 clocking out on
the SO bits ST15:ST8. These will be used if characterizing the RTZ.
- Bits RZ3:RZ2 are used to select the bits.
17
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. Null command should be resent.
Table 12
33991
Analog Integrated Circuit Device Data
Freescale Semiconductor
29
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