WG82574L S LBA8 Intel, WG82574L S LBA8 Datasheet - Page 52

• Manufacturer Part Number: WG82574L S LBA8
• Manufacturer: Intel

Specifications of WG82574L S LBA8

• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: 0C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / RoHS Status: Compliant

Table 25.
3.3.3
52
1. For SST and PMC devices, Flash auto detect is supported by reading the device ID. For Atmel and
Winbond Flash devices, auto-detect is not supported. Software needs to use a mechanism to read
the Flash characteristics directly from the NVM.
Flash: The size of the Flash is selected by the system integrator according to its usage.
The 82574 supports a maximum size of 16 Mb devices, which is beyond any
requirements. The typical Flash size for many applications of the 82574 is 4 Mb. At any
size, the 82574 has the following requirements from the Flash: block erase instruction
of 4 KB and the Flash should support the read device ID instruction that enables the
software to identify an empty device type. The 82574 drives the Flash at a frequency of
~15.6 MHz. The following Flash devices are recommended for use with the 82574:
SST* 25VF0
stands for Flash sizes of 64 KB up to 2 MB.
their major characteristics:
Flash Devices - Major Characteristics
1. Flashes supported by the 82574, must have bits 7, 6, 4 and 0, all equal in the minimum block erase
NVM Device Detection
The 82574 detects the device connected on the SPI interface in two phases.
In reference to the EEPROM, the 82574 detects the length of the address bytes by
sensing the signature at word 0x12. It then sets the NVADDS field in the EEC register.
The exact size of the NVM is fetched by the 82574 from word 0x0F and is stored in the
NVSize field in the EEC register. When operating with an EEPROM that has an invalid
signature, software can force the address length via the NVADDS field in the EEC
register. Controlling the address length enables software to access the EEPROM via the
parallel EERD and EEWR registers in all cases including invalid signature.
Size [bytes]
Maximum write burst size
Minimum block erase size
Device erase instruction
Minimum block erase
instruction
64 KB block erase
instruction
Read ID instruction
Byte program time
Page program time
Minimum block erase time
64 KB erase time
1. It first detects the device type by the state of the NVMT strapping pin.
2. It then looks at the NVM content depending on a valid signature in word 0x12 in the
instruction.
NVM.
Characteristic
1
!
0, PMC* Pm25LV0X0, Winbond* W25X
0.5 MB, 1 MB,
0xAB or 0x90
SST 25VF
Family
1 byte
25 ms
25 ms
20 s
2 MB
0x60
0x20
0x52
4 KB
-
64 KB, 128 KB
PMC 25xxx
256 bytes
100 ms
Family
100 ms
Table 25
0xD7
0xD8
0xAB
30 s
0xC7
5 ms
4 KB
!
0 or Atmel AT25FS0
lists the existing Flash devices and
82574 GbE Controller—Interconnects
Winbond W25X
128 KB, 265 KB,
0xAB or 0x90
256 bytes
150 ms
Family
0.5 MB
1.5 ms
100 s
0xC7
0xD8
0x20
4 KB
1 s
Atmel AT25FS
256 KB, 0.5 MB
!
0x60 or 0xC7
0x20 or 0xD7
0x52 or 0xD8
0xAB or 0x9F
0
1
256 byte
200 ms
Family
7.7 ms
50 ms
while
30 s
4 KB
!