参数资料
型号: MC33970DWR2
厂商: Freescale Semiconductor
文件页数: 31/36页
文件大小: 0K
描述: IC GAUGE DRIVER SPI 24-SOIC
标准包装: 1
应用: 步进电机驱动器,2 相
输出数: 2
电流 - 输出: 100mA
电压 - 负载: 6.5 V ~ 26 V
电源电压: 4.5 V ~ 5.5 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)
TYPICAL APPLICATIONS
INTRODUCTION
TYPICAL APPLICATIONS
INTRODUCTION
The 33970 is an extremely versatile device used in a
variety of applications. Table 22 provides a step-by-step
example of configuring and using many of the features
designed into the IC.
Table 22. 33970 Setup, Configuration, and Usage Example
This example is intended to give a generic overview how
the device could be used. Further, it is intended to familiarize
users with some of its capabilities.
Step
1
Command
PECCR
(a) Enable Gauges
-
Bit PE0: Gauge 0
-
Bit PE1: Gauge 1
Description
Reference Table
and or Figure
Table 7 (page 14 ),
(b) Clock Calibration
-
-
Bit PE3: Enables Calibration Procedure
Bit PE4: Set clock f = 1.0 MHz maximum or nominal
(c) Send 8.0 μ s pulse on CS to calibrate 1.0 MHz clock
2
RTZCR
(a) Set RTZ Full Step Time
-
Bits RC3:RC0
Table 12 (page 17 ),
(b) Set RTZ Blanking Time
-
Bit RC4
(c) Preload RTZ Accumulator
-
Bits RC12:RC11 and RC10:RC5
(d) Check SO for an Out-of-Range Clock Calibration
Table 7 (page 14 ),
-
Is bit CAL logic [1]? If so, then repeat Steps 1 and 2
3
4
POS0R
POS1R
(a) Move pointer to position 12 prior to RTZ
(a) Move pointer to position 12 prior to RTZ
(b) Check SO to see if Gauge 0 has moved
Table 7 (page 14 ),
-
Is bit MOV0 (OD4) logic [1]? If so then the Gauge 0 has moved to the first microstep Table 15 (page 19 )
5
PECCR
(a) Send null command to see if gauges have moved
-
Bit PE12
(b) Check SO to see if Gauge 0 (Gauge 1) has moved
- Is bit MOV0 (OD4) (MOV1 (OD5)) logic [1]? If so, then Gauge 0 (Gauge 1) moved
Table 7 (page 14 ),
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)
- Bit CMD0 (OD10) (CMD1 (OD11)) could also be monitored to determine that the
pointer is static
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 RZ2 is used to select the direction (along with PE7)
(b) Select the RTZ accumulator bits to clock out on the SO bits using bits PE11:PE10. These
will be used if characterizing the RTZ.
Table 7 (page 14 ),
33970
Analog Integrated Circuit Device Data
Freescale Semiconductor
31
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