Description
M25PX64
1
Description
The M25PX64 is a 64-Mbit (8 Mbits x 8) serial flash memory, with advanced write protection
mechanisms, accessed by a high speed SPI-compatible bus.
The M25PX64 supports two new, high-performance dual input/output instructions:
●
●
Dual output fast read (DOFR) instruction used to read data at up to 75 MHz by using
both pin DQ1 and pin DQ0 as outputs
Dual input fast program (DIFP) instruction used to program data at up to 75 MHz by
using both pin DQ1 and pin DQ0 as inputs
These new instructions double the transfer bandwidth for read and program operations.
The memory can be programmed 1 to 256 bytes at a time, using the page program
instruction.
The memory is organized as 128 sectors that are further divided into 16 subsectors each
(2048 subsectors in total).
The memory can be erased a 4-Kbyte subsector at a time, a 64-Kbyte sector at a time, or as
a whole. It can be write protected by software using a mix of volatile and non-volatile
protection features, depending on the application needs. The protection granularity is of 64
Kbytes (sector granularity).
An enhanced fast bulk erase mode is available to speed up bulk erase operations in factory
environment. The device enters this mode whenever the V
PPH
voltage is applied to the write
protect/enhanced program supply voltage pin (W/V
PP
).
The M25PX64 has 64 one-time-programmable bytes (OTP bytes) that can be read and
programmed using two dedicated instructions, Read OTP (ROTP) and Program OTP
(POTP), respectively. These 64 bytes can be permanently locked by a particular program
OTP (POTP) sequence. Once they have been locked, they become read-only and this state
cannot be reverted.
Further features are available as additional security options. More information on these
security features is available, upon completion of an NDA (nondisclosure agreement), and
are, therefore, not described in this datasheet. For more details of this option contact your
nearest Numonyx sales office.
6/66
NUMONYX [ NUMONYX B.V ]
