306666-11 Datasheet, PDF (70/99 Pages) Numonyx B.V – Numonyx StrataFlash Embedded Memory

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
V_PP Status (VPPS)
1 = VPP < VPPLK during program or erase operation.
2
Program Suspend Status (PSS)
0 = Program suspend not in effect.
1 = Program suspend in effect.
1
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 Status (BWS)
0 = BEFP complete.
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 V_PP. 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⁾
Manufacturer Code
Device ID Code
Block Lock Configuration:
• Block Is Unlocked
• Block Is Locked
• Block Is not Locked-Down
• Block Is Locked-Down
Read Configuration Register
Lock Register 0
64-bit Factory-Programmed Protection Register
64-bit User-Programmable Protection Register
0x00
0x01
BBA + 0x02
0x05
0x80
0x81–0x84
0x85–0x88
Data
0089h
ID (see Table 34)
Lock Bit:
DQ₀ = 0b0
DQ₀ = 0b1
DQ₁ = 0b0
DQ₁ = 0b1
RCR Contents
PR-LK0
Factory Protection Register Data
User Protection Register Data
Datasheet
70
November 2007
Order Number: 306666-11