CD016G0PFA Advanced Micro Devices, Inc., CD016G0PFA Datasheet - Page 58

• Manufacturer Part Number: CD016G0PFA
• Description: 16 Megabit(512 K X 32-Bit),CMOS 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/write Flash Memory
• Manufacturer: Advanced Micro Devices, Inc.

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All PPB Erase Command
DYB Write
PPB Lock Bit Set
DYB Status
PPB Status
the sector, the PPB Program command will not execute and the command will
time-out without programming the PPB.
The host system must determine whether a PPB has been fully programmed by
noting the status of DQ0 in the sixth cycle of the PPB Program command. If DQ0
= 0, the entire six-cycle PPB Program command sequence must be reissued until
DQ0 = 1.
The All PPB Erase command is used to erase all PPBs in bulk. There is no means
for individually erasing a specific PPB. Unlike the PPB program, no specific sector
address is required. However, when the PPB erase command is written (60h) and
A6 = 1, all Sector PPBs are erased in parallel. If the PPB Lock Bit is set the ALL
PPB Erase command will not execute and the command will time-out without
erasing the PPBs. The host system must determine whether all PPB has been fully
erased by noting the status of DQ0 in the sixth cycle of the All PPB Erase com-
mand. If DQ0 = 1, the entire six-cycle All PPB Erase command sequence must be
reissued until DQ0 = 1.
It is the responsibility of the user to preprogram all PPBs prior to issuing the All
PPB Erase command. If the user attempts to erase a cleared PPB, over-erasure
may occur making it difficult to program the PPB at a later time. Also note that
the total number of PPB program/erase cycles is limited to 100 cycles. Cycling the
PPBs beyond 100 cycles is not guaranteed.
The All PPB Erase command is permitted if the SecSi sector is enabled.
The DYB Write command is used for setting the DYB, which is a volatile bit that
is cleared at reset. There is one DYB per sector. If the PPB is set, the sector is
protected regardless of the value of the DYB. If the PPB is cleared, setting the
DYB to a 1 protects the sector from programs or erases. Since this is a volatile
bit, removing power or resetting the device will clear the DYBs. The bank address
is latched when the command is written.
The DYB Write command is permitted if the SecSi sector is enabled.
The PPB Lock Bit set command is used for setting the DYB, which is a volatile bit
that is cleared at reset. There is one DYB per sector. If the PPB is set, the sector
is protected regardless of the value of the DYB. If the PPB is cleared, setting the
DYB to a 1 protects the sector from programs or erases. Since this is a volatile
bit, removing power or resetting the device will clear the DYBs. The bank address
is latched when the command is written.
The PPB Lock command is permitted if the SecSi sector is enabled.
The programming of the DYB for a given sector can be verified by writing a DYB
status verify command to the device.
The programming of the PPB for a given sector can be verified by writing a PPB
status verify command to the device.
A d v a n c e
S29CD016G
I n f o r m a t i o n
S29CD016_00A0 March 22, 2004