mx25l3255d Macronix International Co., mx25l3255d Datasheet - Page 23

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mx25l3255d

Manufacturer Part Number
mx25l3255d
Description
Security Serial Flash
Manufacturer
Macronix International Co.
Datasheet

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MX25L3255D
tive and all Write/Program/Erase instruction are ignored. When CS# goes high, it's only in standby mode not deep
power-down mode. It's different from Standby mode.
The sequence of issuing DP instruction is: CS# goes low→sending DP instruction code→ CS# goes high. (see Fig-
ure 27)
Once the DP instruction is set, all instruction will be ignored except the Release from Deep Power-down mode (RDP)
and Read Electronic Signature (RES) instruction. (those instructions allow the ID being reading out). When Power-
down, the deep power-down mode automatically stops, and when power-up, the device automatically is in standby
mode. For RDP instruction the CS# must go high exactly at the byte boundary (the latest eighth bit of instruction
code been latched-in); otherwise, the instruction will not executed. As soon as Chip Select (CS#) goes high, a delay
of tDP is required before entering the Deep Power-down mode and reducing the current to ISB2.
(19) Release from Deep Power-down (RDP), Read Electronic Signature (RES)
The Release from Deep Power-down (RDP) instruction is terminated by driving Chip Select (CS#) High. When Chip
Select
(CS#) is driven High, the device is put in the Stand-by Power mode. If the device was not previously in the Deep
Power-down mode, the transition to the Stand-by Power mode is immediate. If the device was previously in the
Deep Power-down
mode, though, the transition to the Stand-by Power mode is delayed by tRES2, and Chip Select (CS#) must remain
High for at least tRES2(max), as specified in Table 6. Once in the Stand-by Power mode, the device waits to be se-
lected, so that it can receive, decode and execute instructions.
RES instruction is for reading out the old style of 8-bit Electronic Signature, whose values are shown as table of ID
Definitions. This is not the same as RDID instruction. It is not recommended to use for new design. For new design,
please use RDID instruction. Even in Deep power-down mode, the RDP and RES are also allowed to be executed,
only except the device is in progress of program/erase/write cycle; there's no effect on the current program/erase/
write cycle in progress.
The sequence is shown as Figure 28, 29.
The RES instruction is ended by CS# goes high after the ID been read out at least once. The ID outputs repeat-
edly if continuously send the additional clock cycles on SCLK while CS# is at low. If the device was not previously
in Deep Power-down mode, the device transition to standby mode is immediate. If the device was previously in
Deep Power-down mode, there's a delay of tRES2 to transit to standby mode, and CS# must remain to high at least
tRES2(max). Once in the standby mode, the device waits to be selected, so it can be receive, decode, and execute
instruction.
The RDP instruction is for releasing from Deep Power Down Mode.
P/N: PM1431
REV. 0.03, MAR. 13, 2009
23

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