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CAT130081RWI-GT3 датащи(PDF) 8 Page - ON Semiconductor |
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CAT130081RWI-GT3 датащи(HTML) 8 Page - ON Semiconductor |
8 / 14 page CAT130xx Doc. No. MD-1121 Rev. B 8 © 2008 SCILLC. All rights reserved. Characteristics subject to change without notice Erase/Write Enable and Disable The CAT130xx powers up in the write disable state. Any writing after power-up or after an EWDS (write disable) instruction must first be preceded by the EWEN (write enable) instruction. Once the write instruction is enabled, it will remain enabled until power to the device is removed, or the EWDS instruction is sent. The EWDS instruction can be used to disable all CAT130xx write and erase instructions, and will prevent any accidental writing or clearing of the device. Data can be read normally from the device regardless of the write enable/disable status. The EWEN and EWDS instructions timing is shown in Figure 5. Write After receiving a WRITE command (Figure 6), address and the data, the CS (Chip Select) pin must be deselected for a minimum of tCSMIN. The falling edge of CS will start the self clocking for auto-clear and data store cycles on the memory location specified in the instruction. The clocking of the SK pin is not necessary after the device has entered the self clocking mode. The ready/busy status of the CAT130xx can be determined by selecting the device and polling the DO pin. Since this device features Auto-Clear before write, it is NOT necessary to erase a memory location before it is written into. Figure 5. EWEN/EWDS Instruction Timing Figure 6. Write Instruction Timing CS DI STANDBY 10 0 * * ENABLE=11 DISABLE=00 SK SK CS DI DO tCSMIN STANDBY HIGH-Z HIGH-Z 10 1 AN AN-1 A0 DN D0 BUSY READY STATUS VERIFY tSV tHZ tEW |
Аналогичный номер детали - CAT130081RWI-GT3 |
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Аналогичное описание - CAT130081RWI-GT3 |
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