WG82574IT S LBAC Intel, WG82574IT S LBAC Datasheet - Page 262

• Manufacturer Part Number: WG82574IT S LBAC
• Description: CONTROLLER, ENET, INTEL 82574IT, 64PQFN
• Manufacturer: Intel

Specifications of WG82574IT S LBAC

• Ethernet Type: IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
• Supply Voltage Range: 3V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: QFN
• No. Of Pins: 64
• Package / Case: QFN
• Interface Type: I2C, JTAG, PCI, SPI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.1.2.10
Note:
Note:
Note:
262
Base Address Registers (Offset 0x10 - 0x27)
The Base Address Registers (BARs) are used to map the 82574 register space. The
82574L BARs are defined as non-prefetchable, and therefore support 32-bit addressing
only.
Flash size is defined by the NVM.
The default setting of the Flash BAR enables software implement initial programming of
empty (non-valid) Flash via the (parallel) Flash BAR.
The 82574L
physical memory base addresses).
All BARs have the following fields:
Mem
Mem Type
Prefetch
Mem
Memory
Address
Space
IO Address
Space
BAR
0
1
2
3
4
5
Field
Addr.
0x10
0x14
0x18
0x1C
0x20
0x24
0
2:1
3
31:4
31:2
requests I/O resources to support pre-boot operation (prior to allocating
Bit(s)
31
Flash BAR (R/W - 31:23/16; 0b - 22/15:4)
R
R
R
R/W
R/W
Memory BAR (R/W - 31:17; 0b - 16:4)
MSI-X BAR (R/W - 31:14; 0b - 13:4)
R/W
IO BAR (R/W - 31:5; 0b - 4:1)
Reserved (read as all 0b’s)
Reserved (read as all 0b’s)
0b for
memory
1b for I/O
00b (for
32-bit)
0b
0x0
0x0
Initial
Value
0b = Memory space
1b = I/O space.
Indicates the address space size.
00b = 32-bit
10b = 64-bit
The 82574L BARs are 32-bit only.
0b = Non-prefetchable space.
1b = Prefetchable space.
The 82574L implements non-prefetchable space since it has
read side effects.
Read/Write bits and hardwired to 0b depending on the
memory mapping window sizes:
LAN memory spaces are 128 KB.
LAN Flash spaces can be 64 KB and up to 4 MB in powers of
2.
MSI-X memory space is 16 KB.
Flash window size is set by the NVM. The Flash BAR can also
be disabled by the NVM.
Read/Write bits and hardwired to 0b depending on the I/O
mapping window sizes:
LAN I/O space is 32 bytes.
82574 GbE Controller—Programing Interface
4
Description
0b
0b
0b
3
2
00b
00b
00b
0b
1
0b
0b
0b
1b
0