MX29F040C データシートの表示（PDF） - Macronix International

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MX29F040C

4M-BIT [512K x 8] CMOS SINGLE VOLTAGE 5V ONLY EQUAL SECTOR FLASH MEMORY

Macronix International 

MX29F040C

SECTOR ERASE COMMANDS

The Automatic Sector Erase does not require the device

to be entirely pre-programmed prior to executing the Au-

tomatic Set-up Sector Erase command and Automatic

Sector Erase command. Upon executing the Automatic

Sector Erase command, the device will automatically pro-

gram and verify the sector(s) memory for an all-zero data

pattern. The system is not required to provide any con-

trol or timing during these operations.

When the sector(s) is automatically verified to contain

an all-zero pattern, a self-timed sector erase and verify

begin. The erase and verify operations are complete

when the data on Q7 is "1" and the data on Q6 stops

toggling for two consecutive read cycles, at which time

the device returns to the Read mode. The system is not

required to provide any control or timing during these op-

erations.

When using the Automatic Sector Erase algorithm, note

that the erase automatically terminates when adequate

erase margin has been achieved for the memory array

(no erase verification command is required). Sector erase

is a six-bus cycle operation. There are two "unlock" write

cycles. These are followed by writing the set-up com-

mand 80H. Two more "unlock" write cycles are then fol-

lowed by the sector erase command 30H. The sector

address is latched on the falling edge of WE# or CE#,

whichever happens later, while the command (data) is

latched on the rising edge of WE# or CE#, whichever

happens first. Sector addresses selected are loaded

into internal register on the sixth falling edge of WE# or

CE#, whichever happens later. Each successive sector

load cycle started by the falling edge of WE# or CE#,

whichever happens later must begin within 30us from

the rising edge of the preceding WE# or CE#, whichever

happens first. Otherwise, the loading period ends and

internal auto sector erase cycle starts. (Monitor Q3 to

determine if the sector erase timer window is still open,

see section Q3, Sector Erase Timer.) Any command other

than Sector Erase (30H) or Erase Suspend (B0H) during

the time-out period resets the device to read mode.

TABLE 4. Write Operation Status

Status

Q7 Q6 Q5 Q3

Q2

Note1

Note2

Byte Program in Auto Program Algorithm

Q7# Toggle 0 N/A No Toggle

Auto Erase Algorithm

0 Toggle 0

1 Toggle

Erase Suspend Read

1 No 0 N/A Toggle

In Progress

(Erase Suspended Sector)

Toggle

Erase Suspended Mode

Erase Suspend Read

Data Data Data Data Data

(Non-Erase Suspended Sector)

Erase Suspend Program

Q7# Toggle 0 N/A

N/A

Byte Program in Auto Program Algorithm

Q7# Toggle 1 N/A No Toggle

Exceeded Auto Erase Algorithm

0 Toggle 1

1 Toggle

Time Limits Erase Suspend Program

Q7# Toggle 1 N/A

N/A

Note:

1. Q7 and Q2 require a valid address when reading status information. Refer to the appropriate subsection for further

details.

2. Q5 switches to '1' when an Auto Program or Auto Erase operation has exceeded the maximum timing limits.

See "Q5:Exceeded Timing Limits " for more information.

P/N:PM1201

REV. 1.0, DEC. 20, 2005

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