M50LPW012 datasheet(13/35 Pages) STMICROELECTRONICS

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M50LPW012

During the polling period between issuing the

Program/Erase

Suspend

command

and

the

Program/Erase Controller pausing it is possible for

the operation to complete. Once Program/Erase

Controller Status bit indicates that the Program/

Erase Controller is no longer active, the Program

Suspend Status bit or the Erase Suspend Status

bit can be used to determine if the operation has

completed or is suspended. For timing on the

delay

between

issuing

the

Program/Erase

Suspend

command

and

the

Program/Erase

Controller pausing see Table 13.

During

Program/Erase

Suspend

the

Read

Memory Array, Read Status Register, Read

Electronic Signature and Program/Erase Resume

commands will be accepted by the Command

Interface. Additionally, if the suspended operation

was Block Erase then the Program command will

also be accepted; only the blocks not being erased

may be read or programmed correctly.

See Figures 15, Program Suspend & Resume

Flowchart and Pseudo Code, and 18, Erase

Suspend & Resume Flowchart and Pseudo Code,

for suggested flowcharts on using the Program/

Erase Suspend command.

Program/Erase Resume Command. The

Pro-

gram/Erase Resume command can be used to re-

start

the

Program/Erase

Controller

after

Program/Erase Suspend has paused it. One Bus

Write cycle is required to issue the Program/Erase

Resume command. Once the command is issued

subsequent Bus Read operations read the Status

STATUS REGISTER

The Status Register provides information on the

current or previous Program or Erase operation.

Different bits in the Status Register convey

different information and errors on the operation.

To read the Status Register the Read Status

Erase and Program/Erase Resume commands

are issued. The Status Register can be read from

any address.

The Status Register bits are summarized in Table

14, Status Register Bits. Refer to Table 14 in con-

junction with the text descriptions below.

Program/Erase Controller Status (Bit 7). The Pro-

gram/Erase Controller Status bit indicates whether

the Program/Erase Controller is active or inactive.

When the Program/Erase Controller Status bit is

‘0’, the Program/Erase Controller is active; when

the bit is ‘1’, the Program/Erase Controller is inac-

tive.

The Program/Erase Controller Status is ‘0’ imme-

diately after a Program/Erase Suspend command

is issued until the Program/Erase Controller paus-

es. After the Program/Erase Controller pauses the

bit is ‘1’.

During Program and Erase operation the Pro-

gram/Erase Controller Status bit can be polled to

find the end of the operation. The other bits in the

Status Register should not be tested until the Pro-

gram/Erase Controller completes the operation

and the bit is ‘1’.

Table 13. Program and Erase Times

(TA = 0 to 70°C; VCC = 3.0 to 3.6V)

Note: 1. TA = 25°C, VCC = 3.3V

2. This time is obtained executing the Quadruple Byte Program Command.

3. Sampled only, not 100% tested.

4. 10

µs to program 4 Bytes.

Parameter

Interface

Test Condition

Min

Typ (1)

Max

Unit

Byte Program

200

µs

Quadruple Byte Program

A/A Mux

VPP = 12V ± 5%

10(4)

200

µs

Chip Erase

A/A Mux

VPP = 12V ± 5%

3sec

Block Program (64 KBytes)

A/A Mux

VPP = 12V ± 5%

0.1 (2)

sec

VPP < 12V – 5%

0.4

sec

Block Erase (64 KBytes)

VPP = 12V ± 5%

0.75

sec

VPP < 12V – 5%

110

sec

Program/Erase Suspend to Program pause (3)

µs

Program/Erase Suspend to Block Erase pause (3)

µs

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