参数资料
型号: MC33970DWR2
厂商: Freescale Semiconductor
文件页数: 33/36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
Table 22. 33970 Setup, Configuration, and Usage Example (continued)
Step
15
Command
PECCR
Description
(f) Send null command to see if gauges have moved
- Bits PE12
Reference Table
and or Figure
Table 7 (page 14 ),
(g) Check SO to see if Gauge 0 (Gauge 1) moved
- Bit MOV0 (MOV1) logic [1]? If so, Gauge 0 (Gauge 1) moved another microstep. Keep
track of movement. 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 (OD1)) could also be monitored to determine that the pointer is
static
16
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
Table 7 (page 14 ),
Table 11 (page 16 ),
- Bit RZ2 is used to select the direction (along with PE7)
(b) Select the RTZ accumulator bits clocking out on the SO bits using bits PE11:PE10. These
will be used if characterizing the RTZ
17
PECCR
(a) Check the status of the RTZ by sending the null command to monitor SO bit RTZ0
- Bit PE12 is the null command
Table 7 (page 14 ),
(b) Is RTZ0 logic [0]? If not, Gauge 0 still returning and null command should be resent
18
19
20
RTZ
PECCR
PECCR
(c) Return the other gauge to the zero stop. If the second gauge is driving a different pointer
than the first, a new RTZCR command may be required to change the Full Step time
(a) Check the status of the RTZ by sending the null command to monitor SO bit RTZ1
- Bit PE12 is the null command
(b) Is RTZ1 logic [0]? If not, Gauge 1 still returning and null command should be resent
(a) Disable both gauges and go to standby
Table 11 (page 16 ),
Table 7 (page 14 ),
- Bit PE0:PE1 are used to disable the gauges
(b) Put the device to sleep
- RST pin is pulled to logic [0]
33970
Analog Integrated Circuit Device Data
Freescale Semiconductor
33
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