参数资料
型号: MC33970DWR2
厂商: Freescale Semiconductor
文件页数: 12/36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)
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
SPI PROTOCOL DESCRIPTION
The SPI interface has a full-duplex, three-wire
synchronous, 16-bit serial synchronous interface data
transfer and four I/O lines associated with it: Chip Select ( CS ),
Serial Clock (SCLK), Serial Input (SI), and Serial Output
(SO). The SI/SO pins of the 33970 follow a first in/first out
(D15/D0) protocol with both input and output words
transferring the most significant bit first. All inputs are
compatible with 5.0 V CMOS logic levels.
LOGIC COMMANDS AND REGISTERS
This section provides a description of the 33970 SPI behavior. To follow the explanations below, refer to Table 5 and to the
timing diagrams shown in Figure 6 and Figure 7 .
Table 5. Data Transfer Timing
Pin
CS (1-to-0)
CS (0-to-1)
SO
SI
CS
SCLK
Description
SO pin is enabled.
33970 configuration and desired output states are transferred and executed according to the data in
the Shift registers.
Will change state on the rising edge of the SCLK pin signal.
Will accept data on the falling edge of the SCLK pin signal.
SI
SO
D15
OD15
D14
OD14
D13
OD13
D12
OD12
D11
OD11
D10
OD10
D9
OD9
D8
OD8
D7
OD7
D6
OD6
D5
OD5
D4
OD4
D3
OD3
D2
OD2
D1
OD1
D0
OD0
Output shift register is loaded here.
Note SO is tri-stated when CS is logic [1].
Figure 6. Single 16-Bit Word SPI Communication
CS
SCLK
SI
SO
D15
OD15
D14
OD14
D13
OD13
D12
OD12
D11
OD11
D2
OD2
D1
OD1
D0
OD0
D15 *
D15
D14 *
D14
D13 *
D13
D4
OD4
D3
OD3
D2 *
D2
D1 *
D1
D0 *
D0
Notes 1. SO is tri-stated when CS is logic [1].
2. D15, D14, D13, ..., and D0 refer to the first 16 bits of data into the 33970.
3. D15 * , D14 * , D13 * , ..., and D0 * refer to the most recent entry of program data into the 33970.
4. OD15, OD14, OD13, ..., and OD0 refer to the first 16 bits of fault and status data out of the 33970.
Figure 7. Multiple 16-Bit Word SPI Communication
33970
Analog Integrated Circuit Device Data
12
Freescale Semiconductor
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