m59dr032ea STMicroelectronics, m59dr032ea Datasheet - Page 11

• Manufacturer Part Number: m59dr032ea
• Description: 32 Mbit 2mb X 16, Dual Bank, Page 1.8v Supply Flash Memory
• Manufacturer: STMicroelectronics

programming throughput by writing a page of four
adjacent Words in parallel. The four Words must
differ only for the addresses A0 and A1. The V
supply voltage is required to be from 11.4V to
12.6V for the Quadruple Word Program com-
mand.
The command uses the two unlock cycles followed
by a write cycle to set up the command. A further
four cycles are required to latch the address and
data of the four Words and start the Program
Erase Controller.
The Quadruple Word Program command can be
executed in Bypass mode to skip the two unlock
cycles.
Note that the Quadruple Word Program command
cannot change a bit set to ’0’ back to ’1’. One of the
Erase Commands must be used to set all the bits
in a block or in the whole bank from ’0’ to ’1’. If the
Quadruple Word Program command is used to try
to set a bit from ‘0’ to ‘1’ Status Register Error bit
DQ5 will be set to ‘1’.
Enter Bypass Mode Command. The
mode is used to reduce the overall programming
time when large memory arrays need to be pro-
grammed.
The Enter Bypass Mode command uses the two
unlock cycles followed by one write cycle to set up
the command. Once in Bypass mode, it is impera-
tive that only the following commands be issued:
Exit Bypass, Program, Double Word Program or
Quadruple Word Program.
Exit Bypass Mode Command. The Exit Bypass
Mode command uses two write cycles to be set up
and confirmed. The unlock cycles are not required.
After the Exit Bypass Mode command, the device
resets to Read mode.
Program in Bypass Mode Command. The
Program in Bypass Mode command can be is-
sued when the device is in Bypass mode (issue an
Enter Bypass Mode command). It uses the same
sequence of cycles as the Program command with
the exception of the unlock cycles.
Double Word Program in Bypass Mode Com-
mand. The Double Word Program in Bypass
Mode command can be issued when the device is
in Bypass mode (issue an Enter Bypass Mode
command). It uses the same sequence of cycles
as the Double Word Program command with the
exception of the unlock cycles.
Quadruple Word Program in Bypass Mode
Command. The Quadruple Word Program in By-
pass Mode command can be issued when the de-
vice is in Bypass mode (issue an Enter Bypass
Mode command). It uses the same sequence of
cycles as the Quadruple Word Program command
with the exception of the unlock cycles.
Bypass
PP
Block Lock Command. The Block Lock com-
mand is used to lock a block and prevent Program
or Erase operations from changing the data in it.
All blocks are locked at Power-Up or Reset.
Three Bus Write cycles are required to issue the
Block Lock command.
The lock status can be monitored for each block
using the Auto Select command. Table 10 shows
the Lock Status after issuing a Block Lock com-
mand.
The Block Lock bits are volatile, once set they re-
main set until a hardware Reset or Power-Down/
Power-Up. They are cleared by a Block Unlock
command. Refer to the section, Block Locking, for
a detailed explanation.
Block Unlock Command. The
command is used to unlock a block, allowing the
block to be programmed or erased.
Three Bus Write cycles are required to issue the
Block Unlock command.
The lock status can be monitored for each block
using the Auto Select command. Table 10 shows
the lock status after issuing a Block Unlock com-
mand. Refer to the section, Block Locking, for a
detailed explanation.
Block Lock-Down Command. A locked or un-
locked block can be locked-down by issuing the
Block Lock-Down command. A locked-down block
cannot be programmed or erased, or have its pro-
tection status changed when WP is low, V
WP is high, V
abled and the locked blocks can be individually un-
locked by the Block Unlock command.
Three Bus Write cycles are required to issue the
Block Lock-Down command.
The lock status can be monitored for each block
using the Auto Select command. Locked-Down
blocks revert to the locked (and not locked-down)
state when the device is reset on power-down. Ta-
ble 10 shows the Lock Status after issuing a Block
Lock-Down command. Refer to the section, Block
Locking, for a detailed explanation.
The first two bus cycles unlock the Command
Interface.
The third bus cycle sets up the Block Lock
command and latches the block address.
The first two bus cycles unlock the Command
Interface.
The third bus cycle sets up the Block UnLock
command and latches the block address.
The first two bus cycles unlock the Command
Interface.
The third bus cycle sets up the Block Lock-
Down command and latches the block address.
IH,
M59DR032EA, M59DR032EB
the Lock-Down function is dis-
Block
IL
. When
Unlock
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