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TC9WMC1FU Datasheet(PDF) 9 Page - Toshiba Semiconductor |
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TC9WMC1FU Datasheet(HTML) 9 Page - Toshiba Semiconductor |
9 / 16 page TC9WMC1FK/FU,TC9WMC2FK/FU 2007-10-19 9 (3.6) Write Enable (EWEN)/Write Disable (EWDS) The EWEN instruction enables a write operation. In program enable mode, a writing operation is enabled. The EWDS instruction disables a write operation. In program disable mode, a writing operation is disabled. After power on, the device is in EWDS mode. The EWEN instruction must be executed before any write instructions can be carried out. After the CS is driven High, a start bit is transferred followed by the EWEN/EWDS instruction and any addresses. The mode is enabled on the rising edge of SK after the least significant bit (A0) of the address is received. Figure 12. Write Enable/Disable Timing Diagram (TC9WMC2) CS SK 1 2 7 8 9 10 1 0 0 DI x 3 4 5 6 x x x x x 11 1 1 Write enabled 0 1 2 7 8 9 10 10 0x 345 6 x x x x x 11 0 Write disabled CS SK DI Figure 11. Write Enable/Disable Timing Diagram (TC9WMC1) 0 1 2 7 8 9 10 0 345 6 0 x x x x Write disabled CS SK DI 1 2 7 8 9 1 0 0 1 3 4 5 6 x x x x 1 Write enabled CS SK DI |
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