P30
Table 32: Status Register Description (Sheet 2 of 2)
Status Register (SR)
Default Value = 0x80
0 = VPP within acceptable limits during program or erase operation.
3
2
1
VPP Status (VPPS)
1 = VPP < VPPLK during program or erase operation.
0 = Program suspend not in effect.
1 = Program suspend in effect.
Program Suspend Status (PSS)
Block-Locked Status (BLS)
0 = Block not locked during program or erase.
1 = Block locked during program or erase; operation aborted.
After Buffered Enhanced Factory Programming (BEFP) data is loaded into the
buffer:
0 = BEFP complete.
0
BEFP Status (BWS)
1 = BEFP in-progress.
Note: Always clear the Status Register prior to resuming erase operations. It avoids Status Register
ambiguity when issuing commands during Erase Suspend. If a command sequence error
occurs during an erase-suspend state, the Status Register contains the command sequence
error status (SR[7,5,4] set). When the erase operation resumes and finishes, possible errors
during the erase operation cannot be detected via the Status Register because it contains the
previous error status.
14.1.1
Clear Status Register
The Clear Status Register command clears the status register. It functions independent
of VPP. The Write State Machine (WSM) sets and clears SR[7,6,2], but it sets bits
SR[5:3,1] without clearing them. The Status Register should be cleared before starting
a command sequence to avoid any ambiguity. A device reset also clears the Status
Register.
14.2
Read Device Identifier
The Read Device Identifier command instructs the device to output manufacturer code,
device identifier code, block-lock status, protection register data, or configuration
register data (see Section 9.2, “Device Commands” on page 45 for details on issuing
the Read Device Identifier command). Table 33, “Device Identifier Information” on
page 70 and Table 34, “Device ID codes” on page 71 show the address offsets and data
values for this device.
Table 33: Device Identifier Information (Sheet 1 of 2)
Item
Address(1)
Data
Manufacturer Code
0x00
0x01
0089h
ID (see Table 34)
Lock Bit:
Device ID Code
Block Lock Configuration:
• Block Is Unlocked
DQ0 = 0b0
• Block Is Locked
BBA + 0x02
DQ0 = 0b1
• Block Is not Locked-Down
• Block Is Locked-Down
Read Configuration Register
Lock Register 0
DQ1 = 0b0
DQ1 = 0b1
0x05
0x80
RCR Contents
PR-LK0
64-bit Factory-Programmed Protection Register
64-bit User-Programmable Protection Register
0x81–0x84
0x85–0x88
Factory Protection Register Data
User Protection Register Data
Datasheet
70
November 2007
Order Number: 306666-11
NUMONYX [ NUMONYX B.V ]
