S29CD-J_12 SPANSION [SPANSION], S29CD-J_12 Datasheet - Page 35

• Manufacturer Part Number: S29CD-J_12
• Manufacturer: SPANSION [SPANSION]

October 11, 2012 S29CD-J_CL-J_00_B7
8.7.5
8.7.6
Program Suspend/Program Resume Commands
Accelerated Program Operations
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
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
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
Accelerated programming is enabled through the ACC function. This method is faster than the standard
program command sequences.
The device offers accelerated program operations through the ACC pin. When the system asserts V
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. Removing V
embedded program 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 V
 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.
may result.
D a t a
S29CD-J and S29CL-J Flash Family
HH
Write Operation Status on page 36
S h e e t
for operations other than accelerated programming or device damage
HH
from the ACC input, upon completion of the
for more information.
HH
(12V)
35