EN25S10 Datasheet, PDF (8/34 Pages) Eon Silicon Solution Inc. – 1 Megabit 1.8V Serial Flash Memory with 4Kbyte Uniform Sector

Table 3. Protected Area Sizes Sector Organization
EN25S10
Status Register
Content
BP2 BP1 BP0
Bit Bit Bit
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Protect Areas
None
Sector 0 to 15
Sector 0 to 23
All
None
Sector 0 to 27
Sector 0 to 29
All
Memory Content
Addresses
None
000000h-00FFFFh
000000h-017FFFh
000000h-01FFFFh
None
000000h-01BFFFh
000000h-01DFFFh
000000h-01FFFFh
Density(KB)
None
64KB
96KB
128KB
None
112KB
120KB
128KB
Portion
None
Lower 16/32
Lower 24/32
All
None
Lower 28/32
Lower 30/32
All
Hold Function
The Hold (HOLD#) signal is used to pause any serial communications with the device without resetting
the clocking sequence. However, taking this signal Low does not terminate any Write Status Register,
Program or Erase cycle that is currently in progress.
To enter the Hold condition, the device must be selected, with Chip Select (CS#) Low. The Hold
condition starts on the falling edge of the Hold (HOLD#) signal, provided that this coincides with Serial
Clock (CLK) being Low (as shown in Figure 4.).
The Hold condition ends on the rising edge of the Hold (HOLD#) signal, provided that this coincides
with Serial Clock (CLK) being Low.
If the falling edge does not coincide with Serial Clock (CLK) being Low, the Hold condition starts after
Serial Clock (CLK) next goes Low. Similarly, if the rising edge does not coincide with Serial Clock (CLK)
being Low, the Hold condition ends after Serial Clock (CLK) next goes Low. (This is shown in Figure 4.).
During the Hold condition, the Serial Data Output (DO) is high impedance, and Serial Data Input (DI)
and Serial Clock (CLK) are Don’t Care.
Normally, the device is kept selected, with Chip Select (CS#) driven Low, for the whole duration of the
Hold condition. This is to ensure that the state of the internal logic remains unchanged from the mo-
ment of entering the Hold condition.
If Chip Select (CS#) goes High while the device is in the Hold condition, this has the effect of resetting
the internal logic of the device. To restart communication with the device, it is necessary to drive Hold
(HOLD#) High, and then to drive Chip Select (CS#) Low. This prevents the device from going back to
the Hold condition.
Figure 4. Hold Condition Waveform
This Data Sheet may be revised by subsequent versions
8
or modifications due to changes in technical specifications.
©2004 Eon Silicon Solution, Inc.,
Rev. F, Issue Date: 2011/11/07
www.eonssi.com