S29CD032J datasheet(32/76 Pages) SPANSION

32 / 76 page

S29CD-J & S29CL-J Flash Family

S29CD-J_CL-J_00_B1 September 27, 2006

Data

Sheet

(Pre limin ar y)

The following are the allowable operations when Erase Suspend is issued under certain conditions:

For the Busy Sectors, the host system may

Read status

Write the Erase Resume command

For the Non Busy Sectors, the system may

Read data

Program data or write the Suspend/Resume Erase command

8.7.5

Program Suspend/Program Resume Commands

The Program Suspend command allows the system to interrupt an embedded programming operation so that

data can read from any non-suspended sector. When the Program Suspend command is written during a

programming process, the device halts the programming operation and updates the status bits.

After the programming operation has been suspended, the system can read array data from any non-

suspended sector. If a read is needed from the Secured Silicon Sector area, then user must use the proper

command sequences to enter and exit this region. The Sector Erase and Program Resume Command is

ignored if the Secured Silicon sector is enabled.

After the Program Resume command is written, the device reverts to programming. The system can

determine the status of the program operation using the DQ7, DQ6, and/or RY/BY# status bits, just as in the

standard program operation. See Section 8.8, Write Operation Status on page 31 for more information.

The system must write the Program Resume command in order to exit the Program Suspend mode, and

continue the programming operation. Further writes of the Program Resume command are ignored. Another

Program Suspend command can be written after the device has resumed programming.

The following are the allowable operations when Program Suspend is issued under certain conditions:

For the Busy Sectors, the host system may write the Program Resume command

For the Non Busy Sectors, the system may read data

8.7.6

Accelerated Program and Erase Operations

Accelerated programming and erasing is enabled through the ACC function. This method is faster than the

standard program command sequences.

The device offers accelerated program/erase operations through the ACC pin. When the system asserts VHH

(12V) on the ACC pin, the device automatically enters the Unlock Bypass mode. The system may then write

the two-cycle Unlock Bypass program command sequence to do accelerated programming. The device uses

the higher voltage on the ACC pin to accelerate the operation. Any sector that is being protected with the

WP# pin is still protected during accelerated program or Erase. Removing VHH from the ACC input, upon

completion of the embedded program or erase operation, returns the device to normal operation.

Notes

In this mode, the write protection function is bypassed unless the PPB Lock Bit = 1.

The ACC pin must not be at VHH for operations other than accelerated programming and accelerated chip

erase, or device damage may result.

The ACC pin must not be left floating or unconnected; inconsistent behavior of the device may result.

The Accelerated Program command is not permitted if the Secured Silicon sector is enabled.

8.7.7

Unlock Bypass

The device features an Unlock Bypass mode to facilitate faster programming, erasing (Sector and Chip

Erase), as well as CFI commands. Once the device enters the Unlock Bypass mode, only two write cycles are

required to program or erase data, instead of the normal four cycles. This results in faster total programming/

erasing time.

Section 20.1, Command Definitions on page 69 shows the requirements for the unlock bypass command

sequences.

S29CD032J Datasheet(PDF) 32 Page - SPANSION

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