GD82559C S L3DF Intel, GD82559C S L3DF Datasheet - Page 82

• Manufacturer Part Number: GD82559C S L3DF
• Manufacturer: Intel

Specifications of GD82559C S L3DF

• Lead Free Status / Rohs Status: Not Compliant

82559 — Networking Silicon
9.1.3
9.1.4
9.1.5
9.1.6
9.1.7
9.1.8
74
System Control Block General Pointer
The System Control Block (SCB) General Pointer is a 32-bit field that points to various data
structures depending on the command in the CU Command or RU Command field.
PORT
The PORT interface allows software to perform certain control functions on the 82559. This field is
32 bits wide:
Flash Control Register
The Flash Control Register is a 32-bit field that allows access to an external Flash device.
EEPROM Control Register
The EEPROM Control Register is a 32-bit field that enables a read from and a write to the external
EEPROM.
Management Data Interface Control Register
The Management Data Interface (MDI) Control register is a 32-bit field and is used to read and
write bits from the MDI.
Receive Direct Memory Access Byte Count
The Receive DMA Byte Count register keeps track of how many bytes of receive data have been
passed into host memory via DMA.
31:30
29
28
27:26
25:21
20:16
15:0
•
•
Bits
Address and Data (bits 32:4)
PORT Function Selection (bits 3:0)
The 82559 supports four PORT commands: Software Reset, Self-test, Selective Reset, and
Dump.
These bits are reserved and should be set to 00b.
Interrupt Enable. When this bit is set to 1b by software, the 82559 asserts an interrupt to
indicate the end of an MDI cycle.
Ready. This bit is set to 1b by the 82559 at the end of an MDI transaction. It should be reset to
0b by software at the same time the command is written.
Opcode. These bits define the opcode: 01 for MDI write and 10 for MDI read. All other values
(00 and 11) are reserved.
PHY Address. This field of bits contains the PHY address.
PHY Register Address. This field of bits contains the PHY Register Address.
Data. In a write command, software places the data bits in this field, and the 82559 transfers
the data to the PHY unit. During a read command, the 82559 reads these bits serially from the
PHY unit, and software reads the data from this location.
Description
Datasheet