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TPIC8101DWR датащи(PDF) 7 Page - Texas Instruments |
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TPIC8101DWR датащи(HTML) 7 Page - Texas Instruments |
7 / 20 page TPIC8101 KNOCK SENSOR INTERFACE SLIS110A − APRIL 2003 − REVISED MAY 2005 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 ac electrical characteristics, VDD = 5 V ±5%, TA = −40°C to 125°C (unless otherwise specified) DESCRIPTION MIN TYP MAX UNITS fSPI SPI frequency 5 MHz t1 Time from CS falling edge to SCLK rising edge 10 ns t2 Time from CS falling edge to SCLK falling edge 80 ns t3 Time for SCLK to go high 60 ns t4 Time for SCLK to go low 60 ns t5 Time from last SCLK falling edge to CS rising edge 80 ns t6 Time from SDI valid to falling edge of SCLK 60 ns t7 Time for SDI valid after falling edge of SCLK 10 ns t8 Time after CS rises until INT/HOLD to go high 8 ns t9 Time between two words for transmitting 170 ns t10 Time for SDO valid after SDI on bus, at VDD = 5 V and load = 20 pF 40 ns LSB LSB 1 2 3 1 2 3 4 4 5 5 6 6 MSB MSB XXX XXX SCLK SDI SDO INT/HOLD t3 t2 t1 t4 t1 t9 t5 t8 t7 t6 t10 CS Figure 1. Serial Peripherial Interface (SPI) This is an 8-bit SPI protocol used to communicate with the microcontroller in the system for setting various operating parameters. When CS is held high, the signals on the SCLK and SDI lines are ignored and SDO is forced into a high-impedance state. SCLK must be low when CS is asserted low. On each falling edge of the SCLK pulse after CS is asserted low, the new byte is serially shifted into the register. The most significant bit (MSB) is shifted first. Only eight bits in a frame are acceptable. When a number of bits shifted is different than the value eight, the information is ignored and the register retains the old setting. The shift register transfers the data into a latch register after the eighth SCLK clock pulse and when CS transitions from low to high (see Figure 1). The function of the integration mode is to ignore any SPI frame transmission when the INT/HOLD bit = 1. In the hold mode with INT/HOLD = 0, all necessary bytes may be transmitted. |
Аналогичный номер детали - TPIC8101DWR |
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Аналогичное описание - TPIC8101DWR |
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