NP5Q128A13ESFC0E Datasheet, PDF (14/56 Pages) Numonyx B.V – 128-Mbit, Quad/Dual/Single Serial Interface, 128-Kbyte Sectors Phase Change Memory (PCM) with 66MHz SPI Bus Interface

Operating features
4
Operating features
Numonyx® Omneo™ P5Q Datasheet
Note:
Definition of ‘Program’, ‘Bit-alterable Write’ and ‘Program on All 1s’:
– Program on Omneo™ P5Q PCM devices writes only 0s of the user data to the array
and treats 1s as data masks. This is similar to programming on a floating gate flash
device.
– Bit-alterable Write on Omneo™ P5Q PCM devices involves writing both 0s and 1s of
the user data to the array.
– Program on all 1s is similar to ‘program’ where only 0s are written to the array and 1s
are treated as data masks. Program on all 1s also requires that the entire page being
written is previously set to all 1s. Program on all 1s is also referred to as PreSET Write.
4.1
Page programming
To program/write one data byte, two instructions are required: write enable (WREN), which
is one byte, and a page program (PP) sequence, which consists of four bytes plus data byte.
This is followed by the internal program cycle (of duration t_PP).
To spread this overhead, the page program (PP) instruction allows up to 64 bytes to be
programmed/written at a time, provided that they lie in consecutive addresses on the same
page of memory.
For optimized timings, it is recommended to use the page program (PP) instruction to
program all consecutive targeted bytes in a single sequence versus using several page
program (PP) sequences with each containing only a few bytes (see Page program (PP)
and Table 15: AC characteristics).
4.2
Dual input fast program
The dual input fast program (DIFP) instruction makes it possible to program/write up to 64
bytes using two input pins at the same time.
For optimized timings, it is recommended to use the dual input fast program (DIFP)
instruction to program all consecutive targeted bytes in a single sequence rather than using
several dual input fast program (DIFP) sequences each containing only a few bytes (see
Section 6.11: Dual input fast program (DIFP)).
4.3
Quad input fast program
The quad input fast program (QIFP) instruction makes it possible to program/write up to 64
bytes using four input pins at the same time.
For optimized timings, it is recommended to use the quad input fast program (QIFP)
instruction to program all consecutive targeted bytes in a single sequence rather than using
several quad input fast program (QIFP) sequences each containing only a few bytes (see
Section 6.12: Quad input fast program (QIFP)).
14/56