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參數(shù)資料
| 型號： | L5953 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.2 A SWITCHING REGULATOR, 425 kHz SWITCHING FREQ-MAX, PDSO36 |
| 封裝： | LEAD FREE, SOP-36 |
| 文件頁數(shù)： | 10/31頁 |
| 文件大?。?/td> | 420K |
| 代理商： | L5953 |
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Product(s)
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Product(s)
SPI interface
L5953
4
SPI interface
4.1
Signals description
The SPI interface available inside L5953 is able to work both in Mode 0 and Mode 3.
Serial output (Q). The output pin is used to transfer data serially out of the L5953. Data is
shifted out on the falling edge of the serial clock.
Serial input (D). The input pin is used to transfer data serially into the device. It receives
instructions, addresses, and data to be written. Input is latched on the rising edge of the
serial clock.
Serial clock (C). The serial clock provides the timing of the serial interface. Instructions,
addresses, or data present at the input pin are latched on the rising edge of the clock input,
while data on the Q pin changes after the falling edge of the clock input.
Chip select (S). This input is used to select the L5953. The chip is selected by a high to low
transition on the S pin. At any time, the chip is deselected by a low to high transition on the S
pin. As soon as the chip is deselected, the Q pin is at high impedance state. The pin allows
multiple L5953 to share the same SPI bus. After power up, the chip is at the deselect state.
SPI Input/Output are supplied by an external supply voltage VSPI while the core is supplied
by the stand-by regulator VSTBY. The SPI is reset by an internal signal whose buffered
version is RES. (See
4.2
Operations
All instructions, addresses and data are shifted in and out of the chip MSB first. Data input
(D) is sampled on the first rising edge of clock (C) after the chip select (S) goes low. Prior to
any operation, a one-byte instruction code must be entered in the chip. This code is entered
in the chip. This code is entered via the data input (D), and latched on the rising edge of the
clock input (C). To enter an instruction code, the product must have been previously
selected (S = low). Table 1 shows the instruction set and format for device operation. An
invalid instruction (one not contained in table 1) leaves the chip as previously selected.
4.3
Write enable (WREN and write disable (WRDI))
The L5953 contains a write enable latch. This latch must be set prior to every WRITE
operation. The WREN instruction will set the latch and the WRDI instruction will reset the
latch. The latch is reset under all the following conditions:
–– Power on
–
– WRDI instruction executed
As soon as the WREN or WRDI instruction is received by the L5953, the circuit executes the
instruction and enters a wait mode until it is deselected.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L5953_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Multiple switching voltage regulator |
| L5954 | 功能描述:低壓差穩(wěn)壓器 - LDO Airbag App Specific Voltage Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| L5955 | 功能描述:多媒體雜項 Multifunction Voltage Regulator RoHS:否 制造商:Texas Instruments 類型: 通道數(shù)量: 轉(zhuǎn)換速率:540 Mbps 分辨率: 封裝 / 箱體:SOIC-16 封裝:Tube |
| L5956 | 功能描述:多媒體雜項 Multifunction Voltage Regulator RoHS:否 制造商:Texas Instruments 類型: 通道數(shù)量: 轉(zhuǎn)換速率:540 Mbps 分辨率: 封裝 / 箱體:SOIC-16 封裝:Tube |
| L5956_11 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Multifunction voltage regulator for car radio |
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