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參數資料
| 型號： | L9950XPTR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 10 A, PDSO36 |
| 封裝： | ROHS COMPLIANT, SSOP-36 |
| 文件頁數： | 17/39頁 |
| 文件大小： | 620K |
| 代理商： | L9950XPTR |
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Functional description of the SPI
L9950 - L9950XP
Doc ID 10311 Rev 10
4
Functional description of the SPI
4.1
Serial Peripheral Interface (SPI)
This device uses a standard SPI to communicate with a microcontroller. The SPI can be
driven by a microcontroller with its SPI peripheral running in following mode: CPOL = 0 and
CPHA = 0.
For this mode, input data is sampled by the low to high transition of the clock CLK, and
output data is changed from the high to low transition of CLK.
This device is not limited to microcontroller with a build-in SPI. Only three CMOS-compatible
output pins and one input pin will be needed to communicate with the device. A fault
condition can be detected by setting CSN to low. If CSN = 0, the DO pin will reflect the
status bit 0 (fault condition) of the device which is a logical or of all bits in the status registers
0 and 1. The microcontroller can poll the status of the device without the need of a full SPI
communication cycle.
Note:
In contrast to the SPI standard the least significant bit (LSB) will be transferred first
(see Figure 3).
4.2
Chip Select Not (CSN)
The input pin is used to select the serial interface of this device. When CSN is high, the
output pin (DO) will be in high impedance state. A low signal will activate the output driver
and a serial communication can be started. The state when CSN is going low until the rising
edge of CSN will be called a communication frame. If the CSN input pin is driven above
7.5V, the L9950 will go into a test mode. In the test mode the DO will go from tri state to
active mode.
4.3
Serial Data In (DI)
The input pin is used to transfer data serial into the device. The data applied to the DI will be
sampled at the rising edge of the CLK signal and shifted into an internal 24 bit shift register.
At the rising edge of the CSN signal the contents of the shift register will be transferred to
Data Input Register. The writing to the selected Data Input Register is only enabled if exactly
24 bits are transmitted within one communication frame (i.e. CSN low). If more or less clock
pulses are counted within one frame the complete frame will be ignored. This safety function
is implemented to avoid an activation of the output stages by a wrong communication frame.
Note:
Due to this safety functionality a daisy chaining of SPI is not possible. Instead, a parallel
operation of the SPI bus by controlling the CSN signal of the connected ICs is
recommended.
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| L9950 | BRUSH DC MOTOR CONTROLLER, 10 A, PDSO36 |
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| L9953XPTR | BRUSH DC MOTOR CONTROLLER, 10 A, PDSO36 |
| L9953TR | BRUSH DC MOTOR CONTROLLER, 10 A, PDSO36 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| L9951 | 功能描述:馬達/運動/點火控制器和驅動器 REAR DOOR ACTUATOR DRIVER RoHS:否 制造商:STMicroelectronics 產品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L9951_10 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Rear door actuator driver |
| L-995-12 | 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:NylaKrimp? Funnel Entry Ring Tongue Terminal for 4/0 AWG Wire, Stud #12 |
| L9951TR | 功能描述:馬達/運動/點火控制器和驅動器 REAR DOOR ACTUATOR DRIVER RoHS:否 制造商:STMicroelectronics 產品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
| L9951XP | 功能描述:馬達/運動/點火控制器和驅動器 DOOR ACTUATOR DRIVER RoHS:否 制造商:STMicroelectronics 產品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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