JS28F320J3F75A NUMONYX, JS28F320J3F75A Datasheet - Page 35

• Manufacturer Part Number: JS28F320J3F75A
• Description: PARALLEL NOR
• Manufacturer: NUMONYX

Numonyx
9.1.1
Table 21: Clear Status Register Command Bus-Cycles
Note:
9.2
Table 22: Read Mode Command Bus-Cycles
9.2.1
Note:
March 2010
208032-02
Clear Status Register
Read Array
Read Status Register
Read Device Information
CFI Query
®
Embedded Flash Memory (J3 65 nm) Single Bit per Cell (SBC)
Command
Clearing the Status Register
The Status Register (SR) contain Status and error bits which are set by the device. SR
status bits are cleared by the device, however SR error bits are cleared by issuing the
Clear SR command (see
Issuing the Clear SR command places the device in Read SR mode.
Care should be taken to avoid SR ambiguity. If a command sequence error occurs while
in an Erase Suspend condition, the SR will indicate a Command Sequence error by
setting SR.4 and SR.5. When the erase operation is resumed (and finishes), any errors
that may have occurred during the erase operation will be masked by the Command
Sequence error. To avoid this situation, clear the Status Register prior to resuming a
suspended erase operation. The Clear SR command functions independent of the
voltage level on VPEN.
Read Operations
Four types of data can be read from the device: array data, device information, CFI
data, and device status. Upon power-up or return from reset, the device defaults to
Read Array mode. To change the device’s read mode, the appropriate command must
be issued to the device.
device for the desired read mode. The following sections describe each read mode.
Read Array
Upon power-up or return from reset, the device defaults to Read Array mode. Issuing
the Read Array command places the device in Read Array mode. Subsequent reads
output array data on DQ[15:0]. The device remains in Read Array mode until a
different read command is issued, or a program or erase operation is performed, in
which case, the read mode is automatically changed to Read Status.
To change the device to Read Array mode while it is programming or erasing, first issue
the Suspend command. After the operation has been suspended, issue the Read Array
command. When the program or erase operation is subsequently resumed, the device
will automatically revert back to Read Status mode.
Issuing the Read Array command to the device while it is actively programming or
erasing causes subsequent reads from the device to output invalid data. Valid array
data is output only after the program or erase operation has finished.
Command
Device Address
Address Bus
Table 22
Table
Setup Write Cycle
Device Address
Device Address
Device Address
Device Address
21). Resetting the device also clears the SR.
Address Bus
shows the command codes used to configure the
Setup Write Cycle
Data Bus
0050h
Data Bus
0070h
0090h
0098h
00FFh
Address Bus
Address Bus
Confirm Write Cycle
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Confirm Write Cycle
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Data Bus
Data Bus
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Datasheet
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