NX25F011B
NX25F021B
NX25F041B
NexFlash Technologies, Inc.
27
PRELIMINARY NXSF016F-1201
12/12/01 ©
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Read Configuration
Register
Command
16 Clocks
16 Clocks
16 Clocks
SI
SO
8BH
0000H
0000H
0000H
RB[15:0]
CF{15:0}*
Read/Busy
Status
Read Configuration Bits
*The CF Register only uses bits [7:0]
Read Configuration Register (8BH)
The
Read Configuration Register command provides
access to the configuration register, which stores the
current configuration of the
HOLD-R/B pin, read clock
edge, write protect range, and alternate oscillator
frequency (Figure 7). The command sequence is similar
to the
Read from Sector command except that the sector
address field S[15:0] and the byte-address field B[15:0]
are replaced with all 0 bits. After 16 control clocks and
after the Ready/Busy status field has been clocked
through, a 16-bit Configuration Data field CF[15:0]
provides the contents of the Configuration Register.
Although the field is 16-bits long, only bits CF[7:0] are
used. All other upper bits are reserved for future
features.
Read Status Register (83H)
The
Read Status Register command provides access to
the status register and its status flags for Ready/Busy
(R/
B), SRAM and program buffer transfer operations (TX),
Write Enable/Disable (
WE), and Compare Not Equal (CNE)
(Figure 8). The command sequence is similar to the
Read
From Sector command except that the sector address
field S[15:0] and the byte-address field B[15:0] are replaced
by all 0 bits. After 16 clocks and the Ready/Busy status field
RB[15:0] has been read, an 8-bit Status field ST[7:0]
provides the contents of the Status Register.
Read Status
Register
Command
16 Clocks
16 Clocks
16 Clocks
SI
SO
83H
0000H
0000H
0000H
RB[15:0]
ST[7:0]
Read/Busy
Status
Read Status
Register Bits
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