28F640W30 NUMONYX [Numonyx B.V], 28F640W30 Datasheet - Page 56

• Manufacturer Part Number: 28F640W30
• Description: Numonyx Wireless Flash Memory (W30)
• Manufacturer: NUMONYX [Numonyx B.V]

Table 20: Flash Device Identification Codes (Sheet 2 of 2)
10.3
10.4
Datasheet
56
Block Lock-Down Status
Configuration Register
Protection Register Lock Status
Protection Register
Notes:
1.
2.
The address is constructed from a base address plus an offset. For example, to read the Block Lock Status for block
number 38 in a BPD, set the address to the BBA (0F8000h) plus the offset (02h), which in this example is 0F8002h.
Then examine bit 0 of the data to determine whether the block is locked.
See
Section 13.1.4, “Block Lock Status” on page 73
Item
Read Query (CFI)
The W30 flash memory device contains a separate CFI query database that acts as an
on-chip datasheet. To access the CFI information within the W30 flash memory device,
issue the Read Query command and supply a specific address.
The address is constructed from the base address of a partition plus a particular offset
corresponding to the desired CFI field.
Appendix B, “Common Flash Interface” on page 89
their address offsets. Issuing the Read Query command to a partition that is
programming or erasing puts that partition in read query mode while the partition
continues to program or erase in the background.
Read Status Register
The flash device status register displays program and erase operation status. The
status of a partition can be read after writing the Read Status Register command to any
location within the address range of that partition. Read-status mode is the default
read mode following a Program, Erase, or Lock Block command sequence. Subsequent
single reads from that partition return the partition status until another valid command
is written.
The read-status mode supports single synchronous and single asynchronous reads
only; it does not support burst reads.
The first falling edge of OE# or CE# latches and updates Status Register data. The
operation does not affect the modes of other partitions. Because the Status Register is
8 bits wide, only DQ [7:0] contain valid status register data; DQ [15:8] contain zeros.
See
Descriptions” on page
Each 4-Mbit partition contains its own status register. Bits SR[6:0] are unique to each
partition, but SR[7], the Device WSM Status (DWS) bit, pertains to the entire flash
memory device. SR[7] provides the program and erase status of the entire flash
device. By contrast, the Partition WSM Status (PWS) bit, SR[0], provides program and
erase status of the addressed partition only. Status register bits SR[6:1] present
information about partition-specific program, erase, suspend, V
states.
on page 57
Table 21, “Status Register Definitions” on page 57
(
2
)
Table 23, “Status Register Device WSM and Partition Write Status Description”
describes the DWS (SR[7]) and PWS (SR[0]) combinations.
Partition
Partition
Partition
Base
Block
57.
Address
81h - 88h
1
Offset
02h
05h
80h
Register Data
Register Data
for valid lock status.
Lock Data
D1 = 0
D1 = 1
Data
Numonyx™ Wireless Flash Memory (W30)
Numonyx™ Wireless Flash Memory (W30)
shows accessible CFI fields and
and
Block is not locked-down
Block is locked down
Multiple reads required to read the
entire 128-bit Protection Register.
Table 22, “Status Register
PP
, and block-lock
Order Number: 290702-13
Description
November 2007