MBM29LV008BA 데이터 시트보기 (PDF) - Spansion Inc.

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MBM29LV008BA

FLASH MEMORY CMOS 8M (1M × 8) BIT

Spansion Inc. 

MBM29LV008TA/BA-70/90

Extended Command

(1) Fast Mode

MBM29LV008TA/BA has Fast Mode function. This mode dispenses with the initial two unclock cycles required

in the standard program command sequence by writing Fast Mode command into the command register. In

this mode, the required bus cycle for programming is two cycles instead of four bus cycles in standard

program command. (Do not write erase command in this mode.) The read operation is also executed after

exiting this mode. To exit this mode, it is necessary to write Fast Mode Reset command into the command

register. (Refer to “ (8) Embedded ProgramTM Algorithm for Fast Mode” in s FLOW CHART.) The VCC active

current is required even CE = VIH during Fast Mode.

(2) Fast Programming

During Fast Mode, the programming can be executed with two bus cycles operation. The Embedded Program

Algorithm is executed by writing program set-up command (A0h) and data write cycles (PA/PD). (Refer to

to “ (8) Embedded ProgramTM Algorithm for Fast Mode” in s FLOW CHART.)

(3) Extended Sector Protection

In addition to normal sector protection, the MBM29LV008TA/BA has Extended Sector Protection as extended

function. This function enable to protect sector by forcing VID on RESET pin and write a commnad sequence.

Unlike conventional procedure, it is not necessary to force VID and control timing for control pins. The only

RESET pin requires VID for sector protection in this mode. The extended sector protect requires VID on RESET

pin. With this condition, the operation is initiated by writing the set-up command (60h) into the command

register. Then, the sector addresses pins (A19, A18, A17, A16, A15, A14, and A13) and (A10, A6, A1, A0) = (0, 0, 1,

0) should be set to the sector to be protected (recommend to set VIL for the other addresses pins), and write

extended sector protect command (60h). A sector is typically protected in 150 µs. To verify programming of

the protection circuitry, the sector addresses pins (A19, A18, A17, A16, A15, A14, and A13) and (A10, A6, A1, A0) =

(0, 0, 1, 0) should be set and write a command (40h). Following the command write, a logical “1” at device

output DQ0 will produce for protected sector in the read operation. If the output data is logical “0”, please

repeat to write extended sector protect command (60h) again. To terminate the operation, it is necessary to

set RESET pin to VIH.

Write Operation Status

Hardware Sequence Flags

Status

Embedded Program Algorithm

Embedded Erase Algorithm

In Progress

Erase

Suspended

Mode

Erase Suspend Read

(Erase Suspended Sector)

Erase Suspend Read

(Non-Erase Suspended Sector)

Erase Suspend Program

(Non-Erase Suspended Sector)

Embedded Program Algorithm

Exceeded Embedded Erase Algorithm

Time Limits

Erase

Suspended

Mode

Erase Suspend Program

(Non-Erase Suspended Sector)

DQ7 DQ6 DQ5 DQ3 DQ2

DQ7 Toggle 0 0

1

0 Toggle 0 1 Toggle

1

1

0 0 Toggle

Data Data Data Data Data

DQ7 Toggle* 1 0 0

1*2

DQ7 Toggle 1 0

1

0 Toggle 1 1 N/A

DQ7 Toggle 1 0 N/A

*1 : Performing successive read operations from any address will cause DQ6 to toggle.

*2 : Reading the byte address being programmed while in the erase-suspend program mode will indicate logic “1”

at the DQ2 bit. However, successive reads from the erase-suspended sector will cause DQ2 to toggle.

Notes : • DQ0 and DQ1 are reserve pins for future use.

• DQ4 is Fujitsu internal use only.

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