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PDF M25P64 Data sheet ( Hoja de datos )
| Número de pieza | M25P64 | |
| Descripción | Serial Flash Memory | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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M25P64
64 Mbit, low voltage, Serial Flash memory
with 50 MHz SPI bus interface
Features
■ 64 Mbit of Flash memory
■ 2.7 V to 3.6 V single supply voltage
■ SPI bus compatible serial interface
■ 50 MHz clock rate (maximum)
■ VPP = 9 V for Fast Program/Erase mode
(optional)
■ Page Program (up to 256 Bytes)
– in 1.4 ms (typical)
– in 0.35 ms (typical with VPP = 9 V)
■ Sector Erase (512 Kbit)
■ Bulk Erase (64 Mbit)
■ Electronic Signatures
– JEDEC standard two-Byte signature
(2017h)
– RES instruction, one-Byte, signature (16h),
for backward compatibility
■ Hardware Write Protection: protected area size
defined by three non-volatile bits (BP0, BP1
and BP2)
■ More than 100 000 Erase/Program cycles per
sector
■ More than 20-year data retention
■ Packages
– ECOPACK® (RoHS compliant)
VDFPN8 (ME)
8 × 6 mm (MLP8)
SO16 (MF)
300 mils width
January 2007
Rev 6
1/49
www.st.com
1
1 page  
M25P64
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
VDFPN connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SO connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Bus master and memory devices on the SPI bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SPI modes supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Hold condition activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Write Enable (WREN) instruction sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Write Disable (WRDI) instruction sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Read Identification (RDID) instruction sequence and data-out sequence . . . . . . . . . . . . . 25
Read Status Register (RDSR) instruction sequence and data-out sequence . . . . . . . . . . 27
Write Status Register (WRSR) instruction sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Read Data Bytes (READ) instruction sequence and data-out sequence . . . . . . . . . . . . . . 30
Read Data Bytes at Higher Speed (FAST_READ) instruction and data-out sequence . . . 31
Page Program (PP) instruction sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Sector Erase (SE) instruction sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Bulk Erase (BE) instruction sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Read Electronic Signature (RES) instruction sequence and data-out sequence . . . . . . . . 36
Power-up timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Serial input timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Write Protect setup and hold timing during WRSR when SRWD = 1 . . . . . . . . . . . . . . . . . 43
Hold timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Output timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
VPPH timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
VDFPN8 (MLP8) 8-lead Very thin Dual Flat Package No lead, 8 × 6 mm,
package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
SO16 wide – 16 lead Plastic Small Outline, 300 mils body width . . . . . . . . . . . . . . . . . . . . 46
5/49
5 Page 
M25P64
3 SPI modes
SPI modes
These devices can be driven by a microcontroller with its SPI peripheral running in either of
the two following modes:
● CPOL=0, CPHA=0
● CPOL=1, CPHA=1
For these two modes, input data is latched in on the rising edge of Serial Clock (C), and
output data is available from the falling edge of Serial Clock (C).
The difference between the two modes, as shown in Figure 5, is the clock polarity when the
bus master is in Stand-by mode and not transferring data:
● C remains at 0 for (CPOL=0, CPHA=0)
● C remains at 1 for (CPOL=1, CPHA=1)
Figure 4. Bus master and memory devices on the SPI bus
R
SPI Interface with
(CPOL, CPHA) =
(0, 0) or (1, 1)
SDO
SDI
SCK
SPI Bus Master
VSS
VCC
CQD
VCC
VSS
CQD
VCC
VSS
C Q D VCC
VSS
CS3 CS2 CS1
R SPI Memory R
Device
SPI Memory R
Device
SPI Memory
Device
S W/VPP HOLD
S W/VPP HOLD
S W/VPP HOLD
AI13792
1. The Write Protect (W/VPP) and Hold (HOLD) signals should be driven, High or Low as appropriate.
Figure 4 shows an example of three devices connected to an MCU, on an SPI bus. Only one
device is selected at a time, so only one device drives the Serial Data Output (Q) line at a
time, the other devices are high impedance. Resistors R (represented in Figure 4) ensure
that the M25P64 is not selected if the Bus Master leaves the S line in the high impedance
state. As the Bus Master may enter a state where all inputs/outputs are in high impedance
at the same time (for example, when the Bus Master is reset), the clock line (C) must be
connected to an external pull-down resistor so that, when all inputs/outputs become high
impedance, the S line is pulled High while the C line is pulled Low (thus ensuring that S and
C do not become High at the same time, and so, that the tSHCH requirement is met). The
typical value of R is 100 kΩ, assuming that the time constant R*Cp (Cp = parasitic
capacitance of the bus line) is shorter than the time during which the Bus Master leaves the
SPI bus in high impedance.
11/49
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet M25P64.PDF ] | |
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