S25FL004K Meet Spansion Inc., S25FL004K Datasheet - Page 43

• Manufacturer Part Number: S25FL004K
• Description: 4-mbit / 8-mbit / 16-mbit Cmos 3.0 Volt Flash Memory With 104-mhz Spi Serial Peripheral Interface Multi I/o Bus
• Manufacturer: Meet Spansion Inc.

7.19
July 14, 2011 S25FL004K-016K_00_02
Sector Erase (20h)
The Sector Erase instruction sets all memory within a specified sector (4k-bytes) to the erased state of all 1s
(FFh). A Write Enable instruction must be executed before the device will accept the Sector Erase Instruction
(Status Register bit WEL must equal 1). The instruction is initiated by driving the CS# pin low and shifting the
instruction code “20h” followed a 24-bit sector address (A23-A0). (See
for the block diagrams of S25FL004K, S25FL008K, and S25FL016K.) The Sector Erase instruction sequence
is shown in
The CS# pin must be driven high after the eighth bit of the last byte has been latched. If this is not done the
Sector Erase instruction will not be executed. After CS# is driven high, the self-timed Sector Erase instruction
will commence for a time duration of t
Erase cycle is in progress, the Read Status Register instruction may still be accessed for checking the status
of the BUSY bit. The BUSY bit is a 1 during the Sector Erase cycle and becomes a 0 when the cycle is
finished and the device is ready to accept other instructions again. After the Sector Erase cycle has finished
the Write Enable Latch (WEL) bit in the Status Register is cleared to 0. The Sector Erase instruction will not
be executed if the addressed sector is protected by the Block Protect (CMP, SEC, TB, BP2, BP1, and BP0)
bits (see
Table
Figure 7.22 on page
6.2,
CLK
SIO
CS#
SO
Table
Mode 3
Mode 0
D a t a
Figure 7.22 Sector Erase Instruction Sequence Diagram
= MSB
6.3, and
S25FL004K / S25FL008K / S25FL016K
43.
0
Table 6.4
S h e e t
1
SE
Instruction (20h)
.
2
(See AC Electrical Characteristics on page
3
for Status Register Memory Protection (CMP = 0)).
4
5
High Impedance
6
7
23 22
8
9
24-Bit Address
Section 1., Block Diagrams on page 9
2
29 30 31
1
0
Mode 0
Mode 3
64.) While the Sector
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