qh25f320s33b8 Numonyx, qh25f320s33b8 Datasheet - Page 26

• Manufacturer Part Number: qh25f320s33b8
• Description: Numonyx? Serial Flash Memory S33
• Manufacturer: Numonyx

Table 15: SPI Command Set (Sheet 2 of 2)
8.2.1
8.2.2
Datasheet
26
Deep Power-Down
Bulk Erase
Sector Erase
Instruction
Write SPI SR Command (01h)
The Write SR command allows the user to write to the writable Status Register bits
(that is, SR[7, 4:2]. As with any command that writes to the device, the Write Enable
command must be executed prior to the Write SR command to set the WEL bit. If the
WEL bit is not set, the Write SR command will be ignored.
If the device is in Hardware Protect mode, the Write SR command will be ignored and
the WEL bit will be unchanged.
Assuming the WEL bit is set and the device is not in Hardware Protect mode, the rising
edge of S# updates the SR within the t
command is botched (rising S# edge does not occur after exactly sixteen clock cycles),
the writable SR bits and the WEL bit will remain unchanged.
Page Program Command (02h)
The Page Program command programs 1 bit to 256 bytes of data within a 256-Byte-
Aligned memory segment. This command is used for programming the main array; it is
not used for OTP programming.
The command sequence consists of an 8-bit OP Code, followed by a 24-bit address, and
then by the data bytes to be programmed. The data to be programmed must be in
whole-byte granularity. Otherwise, the command sequence will be ignored. To program
in bit granularity, the remainder of the bits within the data byte must be set to "1".
The input data stream is loaded into a 256-Byte program buffer. The starting address of
the program buffer is A[7:0] of the user-supplied address, and all subsequent bytes
from the input data stream are loaded sequentially into the program buffer. If the
program buffer reaches its maximum address, it wraps over, and subsequent data
bytes are sequentially loaded starting at the beginning of the program buffer.
If more than 256 bytes of data are provided in the command input stream, the
program buffer will be over-written, replacing the data that was previously loaded. The
command sequence ends when S# goes high. When the command sequence ends, the
data in the program buffer is programmed in the 256-Byte-Aligned memory segment
defined by A[23:8] of the user-supplied address.
A byte count is not required with this command. The end of the data stream is
identified with the rising edge of S#.
Op Code
D8h
B9h
C7h
Bytes
Addr
—
—
3
DummyB
ytes
—
—
—
Bytes
Data
SHSL
—
—
—
specification time. If the Write SR
Puts device in DPD mode, whereby all
commands are ignored except the
Release from DPD command (ABh).
Serially erases all main memory
Sectors including the eight parameter
blocks.
Erases a 64 KB Memory Sector; when
addressing a parameter block, it will
erase all eight 8 KB parameter blocks.
Numonyx™ Serial Flash Memory (S33)
Name and Function
Order Number: 314822-03
December 2007