S25FL016A Meet Spansion Inc., S25FL016A Datasheet - Page 18

• Manufacturer Part Number: S25FL016A
• Description: 16 Megabit Cmos 3.0 Volt Flash Memory With 50 Mhz Spi Bus Interface
• Manufacturer: Meet Spansion Inc.

9.4
18
Write Enable (WREN)
The Write Enable (WREN) command (see
enables the device to accept a Write Status Register, program, or erase command. The WEL bit must be set
prior to every Page Program (PP), Erase (SE or BE) and Write Status Register (WRSR) command.
The host system must first drive CS# low, write the WREN command, and then drive CS# high.
CS#
SCK
SO
SI
Mode 3
Mode 0
Hi-Z
Figure 9.3 Read Identification (RDID) Command Sequence and Data-Out Sequence
Manufacturer Identification
CS#
SCK
SO
SI
0
1
01h
Mode 3
Mode 0
2
Table 9.1 Read Identification (RDID) Data-Out Sequence
Hi-Z
Figure 9.4 Write Enable (WREN) Command Sequence
Command
3
4
5
0 1
6
S25FL016A
Figure
7
2 3
D a t a
Command
MSB
8
Manufacturer Identification
4 5 6 7
9.4) sets the Write Enable Latch (WEL) bit to a 1, which
9
10 11 12
S h e e t
Memory Type
02h
13
14 15 16
Device Identification
15
S25FL016A_00_C3 January 7, 2008
14
Device Identification
17 18
13
Memory Capacity
3
28 29 30 31
2
14h
1
0