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FM25D04C-1ACB2R Просмотр технического описания (PDF) - FIDELIX

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FM25D04C-1ACB2R Datasheet PDF : 61 Pages
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11.2.19 Chip Erase (C7h / 60h)
The Chip Erase instruction sets all memory within the device to the erased sate of all 1s (FFh). A
Write Enable instruction must be executed before the device will accept the Chip Erase Instruction
(Status Register bit WEL must equal 1). The instruction is initiated by driving the /CS pin low and
shifting the instruction code “C7h” or “60h”. The Chip Erase instruction sequence is shown in figure
The /CS pin must be driven high after the eighth bit has been latched. If this is not done the Chip
Erase instruction will not be executed. After /CS is driven high, the self-timed Chip Erase
instruction will commence for a time duration of tCE (See AC Characteristics). While the Chip
Erase cycle is in progress, the Read Status Register instruction may still be accessed to check the
status of the BUSY bit. The BUSY bit is a 1 during the Chip Erase cycle and becomes a 0 when
the cycle is finished and the device is ready to accept other instructions again. After the Chip Erase
cycle has finished the Write Enable Latch (WEL) bit in the Status Register is cleared to 0. The Chip
Erase instruction will not be executed if any page is protected by the Block Protect (SEC, TB, BP2,
BP1, and BP0) bits (see Status Register Memory Protection table).
Figure 19. Chip Erase Instruction Sequence Diagram
preliminary(Aug.18.2010) 35
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