參數(shù)資料
型號(hào)： S25L004A0LMAI003
廠商： SPANSION LLC
元件分類(lèi)： PROM
英文描述： 4M X 1 FLASH 3V PROM, PDSO8
封裝： 0.208 INCH, PLASTIC, SOP-8
文件頁(yè)數(shù)： 24/39頁(yè)
文件大小： 945K
代理商： S25L004A0LMAI003
28
S25FL Family (Serial Peripheral Interface) S25FL004A
S25FL004A_00_A1 March 28, 2005
Ad va n c e
In f o rm a t i o n
Figure 17. Release from Deep Power Down and Read Electronic Signature (RES) Instruction Sequence
Power-up and Power-down
The device must not be selected at power-up or power-down (that is, CS# must
follow the voltage applied on VCC) until VCC reaches the correct value as follows:
VCC (min) at power-up, and then for a further delay of tPU (as described in
VSS at power-down
A simple pull-up resistor on Chip Select (CS#) can usually be used to insure safe
and proper power-up and power-down.
The device ignores all instructions until a time delay of tPU (as described in
Table 7, on page 29) has elapsed after the moment that VCC rises above the min-
imum VCC threshold. However, device correct operation is not guaranteed if by
this time VCC is still below VCC (min). No Write Status Register, Program, or Erase
instructions should be sent until tPU after VCC reaches the minimum VCC
threshold.
At power-up, the device is in Standby mode (not Deep Power Down mode) and
the WEL bit is reset.
Normal precautions must be taken for supply rail decoupling to stabilize the
VCC(min) feed. Each device in a system should have the VCC rail decoupled by a
suitable capacitor close to the package pins (this capacitor is generally in the
order of 0.1 F).
At power-down, when VCC drops from the operating voltage to below the VCC(min)
threshold, all operations are disabled and the device does not respond to any in-
structions. (The designer needs to be aware that if a power-down occurs while a
Write, Program, or Erase cycle is in progress, data corruption can result.)
CS#
SCK
SI
SO
3 Dummy
Bytes
High Impedance
MSB
Deep Power Down Mode
Standby Mode
0
1
2
3
4
567
8
9
10
28 29 30 31 32 33 34 35 36 37 38
Electronic ID out
Instruction
tRES
23 22 21
3
2
10
7
654
32
1
0
MSB
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