EN25Q16A
Table 3. Protected Area Sizes Sector Organization
Status Register Content
Memory Content
BP3 BP2 BP1 BP0
Protect Areas
Addresses
None
Density(KB)
None
Portion
Bit
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Bit
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Bit
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Bit
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
None
None
Block 0 to 30
Block 0 to 29
Block 0 to 27
Block 0 to 23
Block 0 to 15
All
All
None
Block 31 to 1
Block 31 to 2
Block 31 to 4
Block 31 to 8
000000h-1EFFFFh 1984KB
000000h-1DFFFFh 1920KB
000000h-1BFFFFh 1792KB
000000h-17FFFFh 1536KB
000000h-0FFFFFh 1024KB
000000h-1FFFFFh 2048KB
000000h-1FFFFFh 2048KB
Lower 31/32
Lower 30/32
Lower 28/32
Lower 24/32
Lower 16/32
All
All
None
None
None
1FFFFFh-010000h 1984KB
1FFFFFh-020000h 1920KB
1FFFFFh-040000h 1792KB
1FFFFFh-080000h 1536KB
Upper 31/32
Upper 30/32
Upper 28/32
Upper 24/32
Upper 16/32
All
Block 31 to 16 1FFFFFh-100000h 1024KB
All
All
1FFFFFh-000000h 2048KB
1FFFFFh-000000h 2048KB
All
INSTRUCTIONS
All instructions, addresses and data are shifted in and out of the device, most significant bit first. Serial
Data Input (DI) is sampled on the first rising edge of Serial Clock (CLK) after Chip Select (CS#) is
driven Low. Then, the one-byte instruction code must be shifted in to the device, most significant bit first,
on Serial Data Input (DI), each bit being latched on the rising edges of Serial Clock (CLK).
The instruction set is listed in Table 4. Every instruction sequence starts with a one-byte instruction
code. Depending on the instruction, this might be followed by address bytes, or by data bytes, or by
both or none. Chip Select (CS#) must be driven High after the last bit of the instruction sequence has
been shifted in. In the case of a Read Data Bytes (READ), Read Data Bytes at Higher Speed
(Fast_Read), Dual Output Fast Read (3Bh), Dual I/O Fast Read (BBh), Quad Input/Output
FAST_READ (EBh), Read Status Register (RDSR) or Release from Deep Power-down, and Read
Device ID (RDI) instruction, the shifted-in instruction sequence is followed by a data-out sequence.
Chip Select (CS#) can be driven High after any bit of the data-out sequence is being shifted out.
In the case of a Page Program (PP), Sector Erase (SE), Block Erase (BE), Chip Erase (CE), Write
Status Register (WRSR), Write Enable (WREN), Write Disable (WRDI) or Deep Power-down (DP)
instruction, Chip Select (CS#) must be driven High exactly at a byte boundary, otherwise the instruction
is rejected, and is not executed. That is, Chip Select (CS#) must driven High when the number of clock
pulses after Chip Select (CS#) being driven Low is an exact multiple of eight. For Page Program, if at
any time the input byte is not a full byte, nothing will happen and WEL will not be reset.
In the case of multi-byte commands of Page Program (PP), and Release from Deep Power Down
(RES ) minimum number of bytes specified has to be given, without which, the command will be
ignored.
In the case of Page Program, if the number of byte after the command is less than 4 (at least 1
data byte), it will be ignored too. In the case of SE and BE, exact 24-bit address is a must, any
less or more will cause the command to be ignored.
All attempts to access the memory array during a Write Status Register cycle, Program cycle or Erase
cycle are ignored, and the internal Write Status Register cycle, Program cycle or Erase cycle continues
unaffected.
This Data Sheet may be revised by subsequent versions
or modifications due to changes in technical specifications.
©2004 Eon Silicon Solution, Inc.,
www.eonssi.com
10
Rev. E, Issue Date: 2011/07/14
EON [ EON SILICON SOLUTION INC. ]
