AM29PL320DB70RWPI datasheet(22/50 Pages) SPANSION

22 / 50 page

Am29PL320D

October 2, 2003

Erase Suspend mode, the system may once again

read array data with the same exception. See “Erase

Suspend/Erase Resume Commands” for more infor-

mation on this mode.

The system

must issue the reset command to re-en-

able the device for reading array data if DQ5 goes

high, or while in the autoselect mode. See the “Reset

Command” section, next.

See also “Requirements for Reading Array Data” in the

“Device Bus Operations” section for more information.

The Read Operations table provides the read parame-

ters, and Figure 13 shows the timing diagram.

Reset Command

Writing the reset command to the device resets the de-

vice to reading array data. Address bits are don’t care

for this command.

The reset command may be written between the se-

quence cycles in an erase command sequence before

erasing begins. This resets the device to reading array

data. Once erasure begins, however, the device ig-

nores reset commands until the operation is complete.

The reset command may be written between the se-

quence cycles in a program command sequence

before programming begins. This resets the device to

reading array data (also applies to programming in

Erase Suspend mode). Once programming begins,

however, the device ignores reset commands until the

operation is complete.

The reset command may be written between the se-

quence cycles in an autoselect command sequence.

Once in the autoselect mode, the reset command

must

be written to return to reading array data (also applies

to autoselect during Erase Suspend).

If DQ5 goes high during a program or erase operation,

writing the reset command returns the device to read-

ing array data (also applies during Erase Suspend).

Autoselect Command Sequence

The autoselect command sequence allows the host

system to access the manufacturer and devices codes,

and determine whether or not a sector is protected.

Table 13 shows the address and data requirements.

The autoselect command sequence is initiated by writ-

ing two unlock cycles, followed by the autoselect

command. The device then enters the autoselect mode,

and the system may read any number of autoselect

codes without reinitiating the command sequence.

Tables 13 and 14 show the address and data require-

ments for the command sequence. To determine sec-

tor protection information, the system must write to the

appropriate sector address (SA). Tables 4 and 6 show

the address range associated with each sector.

The system must write the reset command to exit the

autoselect mode and return to reading array data.

Enter SecSi

™ Sector/Exit SecSi Sector

Command Sequence

The SecSi Sector region provides a secured data area

containing a random, eight-word (or four double word)

electronic serial number (ESN). The system can ac-

cess the SecSi Sector region by issuing the three-

cycle Enter SecSi Sector command sequence. The

device continues to access the SecSi Sector region

until the system issues the four-cycle Exit SecSi Sec-

tor command sequence. The Exit SecSi Sector com-

m a nd s eque nc e ret u r n s the dev ic e to nor mal

operation. Table 13 shows the address and data re-

quirements for both command sequences. See also

“Sec Si

™ (S ecu red Silic on ) Sec tor Fla sh

Memory Region” for further information.

Word/Double Word Program

Command Sequence

The system may program the device by word or double

word, depending on the state of the WORD# input.

Programming is a four-bus-cycle operation. The pro-

gram command sequence is initiated by writing two

unlock write cycles, followed by the program set-up

command. The program address and data are written

next, which in turn initiate the Embedded Program al-

gorithm. The system is

not required to provide further

controls or timings. The device automatically gener-

ates the program pulses and verifies the programmed

cell margin. Table 13 shows the address and data re-

quirements for the program command sequence.

When the Embedded Program algorithm is complete,

the device then returns to reading array data and ad-

dresses are no longer latched. The system can

determine the status of the program operation by using

DQ7 or DQ6. See “Write Operation Status” for informa-

tion on these status bits.

Any commands written to the device during the Em-

bedded Program Algorithm are ignored. The Program

command sequence should be reinitiated once the de-

vice has reset to reading array data, to ensure data

integrity.

Programming is allowed in any sequence and across

sector boundaries. A bit cannot be programmed

from a “0” back to a “1”. Attempting to do so may

halt the operation and set DQ5 to “1,” or cause the

Data# Polling algorithm to indicate the operation was

successful. However, a succeeding read will show that

the data is still “0”. Only erase operations can convert

a “0” to a “1”.

AM29PL320DB70RWPI 数据表(PDF) 22 Page - SPANSION

AM29PL320DB70RWPI 数据表(HTML) 22 Page - SPANSION

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

数据表下载

链接网址

AM29PL320DB70RWPI 数据表(PDF) 22 Page - SPANSION

AM29PL320DB70RWPI 数据表(HTML) 22 Page - SPANSION

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

数据表 下载

链接网址

数据表下载