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SN74ALS29818 数据表(PDF) 7 Page - Texas Instruments |
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SN74ALS29818 数据表(HTML) 7 Page - Texas Instruments |
7 / 13 page SN74ALS819, SN74ALS29818 8BIT DIAGNOSTICS/PIPELINE REGISTERS SDAS105A − JANUARY 1986 − REVISED OCTOBER 1986 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001 7 Function Tables SN74ALS819 INPUTS OUTPUT AND I/O MODE SDI SRCLK ORCLK SDO Y0 − Y7 PE DQ0 − DQ7 OPERATION OR FUNCTION L X ↑ X SR7 OUTPUT HI-Z Serial input, shift right H L ↑ X SDI (L) OUTPUT INPUT Parallel load shadow register from DQ0 − DQ7 H L ↑ ↑ SDI (L) OUTPUT INPUT Parallel load shadow register and pipeline register from DQ0 − DQ7 L X X L X X ↑ ↑ SR7 − OUTPUT INPUT Load pipeline register from DQ0 − DQ7 L X ↑ ↑ SR7 OUTPUT INPUT Load pipeline register from DQ0 − DQ7 while shifting shadow register H H No ↑ ↑ SDI (H) OUTPUT OUTPUT Load pipeline register from shadow register H X X X SDI OUTPUT − Serial data in to serial data out H H X X SDI (H) OUTPUT OUTPUT HOLD Hold shadow register, enable DQ0 − DQ7, transitions on SRCLK ignored L X X L X X X X SR7 − OUTPUT HI-Z Disable DQ0 − DQ7 outputs SN74ALS29818 INPUTS OUTPUT AND I/O OPERATION OR FUNCTION MODE OEY SDI SRCLK ORCLK SDO Y0 − Y7 DQ0 − DQ7 OPERATION OR FUNCTION L X X ↑ X SR7 − HI-Z Serial input, shift right, disable DQ0 − DQ7 H H L ↑ X SDI (L) INPUT HI-Z Parallel load shadow register from Y0 − Y7, disable DQ0 − DQ7 H L L ↑ No ↑ SDI (L) OUTPUT HI-Z Parallel load shadow register from pipeline register, disable DQ0 − DQ7 L X X X ↑ SR7 − INPUT† Load pipeline register from DQ0 − DQ7 L X X ↑ ↑ SR7 − INPUT† Load pipeline register from DQ0 − DQ7 while shifting shadow register H X X No ↑ ↑ SDI − − Load pipeline register from shadow register H X X X X SDI − − Serial data in to serial data out H L L ↑ ↑ SDI (L) OUTPUT HI-Z Exchange data between registers, DQ0 − DQ7 disabled H X H X X SDI (H) − − Hold shadow register, transitions on SRCLK do not effect shadow register H X H ↑ X SDI (H) − OUTPUT Enable DQ0 − DQ7 for parallel shadow register output † The DQ0 −DQ7 outputs must be disabled before applying data to DQ0 −DQ7. |
类似零件编号 - SN74ALS29818 |
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