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TPIC44L02DBR データシート(PDF) 9 Page - Texas Instruments |
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TPIC44L02DBR データシート(HTML) 9 Page - Texas Instruments |
9 / 24 page TPIC44L01, TPIC44L02, TPIC44L03 4CHANNEL SERIAL AND PARALLEL LOW SIDE PREFET DRIVER SLIS062B – NOVEMBER 1996 – REVISED AUGUST 2001 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PRINCIPLES OF OPERATION serial data operation The TPIC44L01, TPIC44L02, and TPIC44L03 offer serial input interface to the microcontroller to transfer control data to the predriver and fault data back to the controller. The serial input interface consists of: D SCLK – Serial clock D CS – Chip select D SDI – Serial data input D SDO – Serial data output Serial data is shifted into the least significant bit (LSB) of the SDI shift register on the rising edge of the first SCLK after CS has transitioned from 1 to 0. Four clock cycles are required to shift the first bit from the LSB to the most significant bit (MSB) of the shift register. Four clock cycles must occur before CS transitions high for proper control of the outputs. Less than four clock cycles result in fault data being latched into the output control buffer. Eight bits of data can be shifted into the device, but the first 4 bits shifted out are always the fault data and the last 4 bits shifted in are always the output control data. A low-to-high transition on CS latches the contents of the serial shift register into the output control register. A logic 0 input to SDI turns the corresponding parallel output off and a logic 1 input turns the output on (see Figure 12). GATE3 ON GATE2 ON GATE1 OFF GATE0 OFF 12 3 4 Present Output Data New Data 3-State FLT3 FLT2 FLT1 FLT0 IN3 3-State SCLK CS SDI New Data Output Control Register Data SDO (a) 4-Bit Serial Word Example Figure 12 |
同様の部品番号 - TPIC44L02DBR |
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同様の説明 - TPIC44L02DBR |
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