Numonyx® Embedded Flash Memory (J3 65 nm) Single Bit per Cell (SBC)
To resume a suspended program or erase operation, issue the Resume command to
any device address. The read mode of the device is automatically changed to Read
Status Register. The operation continues where it left off, STS (in RY/BY# mode) goes
low, and the respective Status Register bits are cleared.
When the Resume command is issued during a simultaneous erase-suspend/ program-
suspend condition, the programming operation is resumed first. Upon completion of the
programming operation, the Status Register should be checked for any errors, and
cleared. The resume command must be issued again to complete the erase operation.
Upon completion of the erase operation, the Status Register should be checked for any
errors, and cleared.
9.7
Status Signal
The STATUS (STS) signal can be configured to different states using the STS
Configuration command (Table 26). Once the STS signal has been configured, it
remains in that configuration until another Configuration command is issued or RP# is
asserted low. Initially, the STS signal defaults to RY/BY# operation where RY/BY# low
indicates that the WSM is busy. RY/BY# high indicates that the state machine is ready
for a new operation or suspended. Table 27 displays possible STS configurations.
Table 26: STS Configuration Register Command Bus-Cycles
Setup Write Cycle
Command
Confirm Write Cycle
Address Bus
Data Bus
Address Bus
Device Address
Data Bus
STS Configuration
Device Address
00B8h
Register Data
To reconfigure the STATUS (STS) signal to other modes, the Configuration command is
given followed by the desired configuration code. The three alternate configurations are
all pulse mode for use as a system interrupt as described in the following paragraphs.
For these configurations, bit 0 controls Erase Complete interrupt pulse, and bit 1
controls Program Complete interrupt pulse. Supplying the 00h configuration code with
the Configuration command resets the STS signal to the default RY/BY# level mode.
The Configuration command may only be given when the device is not busy or
suspended. Check SR.7 for device status. An invalid configuration code will result in
SR.4 and SR.5 being set.
Note:
STS Pulse mode is not supported in the Clear Lock Bits and Set Lock Bit commands.
Jan 2011
208032-03
Datasheet
41
MICRON [ MICRON TECHNOLOGY ]
