rc28f320j3d75d Numonyx, rc28f320j3d75d Datasheet - Page 36

• Manufacturer Part Number: rc28f320j3d75d
• Manufacturer: Numonyx

9.0
9.1
Table 19: Status Register Bit Definitions
Datasheet
36
Status Register (SR)
Status
Ready
Bit
7
7
6
5
4
3
2
1
0
Ready Status
Erase Suspend Status
Erase Error
Program
Error
Program Suspend Status
Block-Locked Error
Error
Suspend
Status
Erase
Flash Operations
This section describes the operational features of flash memory. Operations are
command-based, wherein command codes are first issued to the device, then the
device performs the desired operation. All command codes are issued to the device
using bus-write cycles. A complete list of available command codes can be found in
Section 10.0, “Device Command Codes” on page
Status Register
The Status Register (SR) is an 8-bit, read-only register that indicates device status and
operation errors. To read the Status Register, issue the Read Status Register command.
Subsequent reads output Status Register information on DQ[7:0], and 00h on
DQ[15:8].
SR status bits are set and cleared by the device. SR error bits are set by the device, but
must be cleared using the Clear Status Register command. Upon power-up or exit from
reset, the Status Register defaults to 80h. Page-mode reads are not supported in this
read mode. Status Register contents are latched on the falling edge of OE# or the first
edge of CEx that enables the device. OE# must toggle to V
disabled before further reads to update the Status Register latch. The Read Status
Register command functions independently of V
6
Name
Command
Sequence
Error
Erase
Error
5
0 = Device is busy; SR[6:] are invalid (Not driven);
1 = Device is ready; SR[6:0] are valid.
0 = Erase suspend not in effect.
1 = Erase suspend in effect.
0 =
1 =
aborted.
0 = Program suspend not in effect.
1 = Program suspend in effect.
0 = Block NOT locked during program or erase - operation successful.
1 = Block locked during program or erase - operation aborted.
Program
Error
SR5 SR4
0
0
1
1
4
within acceptable limits during program or erase operation.
not within acceptable limits during program or erase operation. Operation
0
1
0
1
= Program or erase operation successful.
= Program error - operation aborted.
= Erase error - operation aborted.
= Command sequence error - command aborted.
Program/
Voltage
Erase
Error
3
Program
Suspend
Numonyx™ Embedded Flash Memory (J3 v. D)
Status
PEN
Description
47.
2
voltage.
IH
Block-Locked
or the device must be
Error
1
Default Value = 80h
November 2007
308551-05
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