Achronix Speedster22i 10G/40G/100G Ethernet - Manual (Page 87)

UG029, September 6, 2013 87
Auto-Negotiation Registers
The Auto-Negotiation Registers are located on page 28. Each segment has its own set of 16
auto-negotiation control and status registers. The register map of each register set is identical
and shown below.
The following register map shows a 32-Bit register implementation. The address is given in
steps of 4 to indicate the 32-bit alignment of the register space. All auto-negotiation registers
are only 16-bit wide (15:0). Write accesses to the upper 16-bit (31:16) are ignored, and read
always return 0 for these.
Bit 0 is the least significant bit and all registers are initialized to zero upon reset except when
stated otherwise.
The following register and bit types are used:

RW: Read/write register. Unused bits should be written with 0 and ignored on read.

RO: Read only, write has no effect.
Reserved bits or registers default to 0 and are read-only if not stated otherwise.
Table 47 – Auto-Negotiation Register Map Addresses
Reg#
Address
Range (Hex)
Description
[0:15] 00-38 Segment 0 Auto-Negotiation Registers
[16 – 31] 40 - 7C Segment 1 Auto-Negotiation Registers
[32 – 47] 80 -BC Segment 2 Auto-Negotiation Registers
[48 – 63] C0 - FC Segment 3 Auto-Negotiation Registers
[64 – 79] 100 – 13C Segment 4 Auto-Negotiation Registers
[80 – 95] 140 - 17C Segment 5 Auto-Negotiation Registers
[96 – 111] 180 -1BC Segment 6 Auto-Negotiation Registers
[112 – 127] 1C0 - 1FC Segment 7 Auto-Negotiation Registers
[128 – 143] 200 – 23C Segment 8 Auto-Negotiation Registers
[144 – 159] 240 - 27C Segment 9 Auto-Negotiation Registers
[160 – 175] 280 - 2BC Segment 10 Auto-Negotiation Registers
[176 – 191] 2C0 - 2FC Segment 11 Auto-Negotiation Registers
[192 – 255] 300 - 3FC Reserved
Table 48 – Auto-Negotiation Register Map Offsets
Address
Offset
(hex)
Register
Name
Type Description Reset
00
KXAN_
CONTRO
L
RW
Auto-negotiation function control.
See “0” on page 89.
0x0000
04
KXAN_ST
ATUS
RO
Auto-negotiation function status.
See “0” on page 89.
0x0000
08
KXAN_
ABILITY_
0
RW
Advertised ability word, bits 15:0.
Bit 0 is the ability word bit 0, bit 15 is the ability
word bit 15.
0x0001
0C
KXAN_
ABILITY_
1
RW
Advertised ability word, bits 31:16
Bit 0 is the ability word bit 16, bit 15 is the ability
word bit 31.
0x0
10 KXAN_ RW Advertised ability word, bits 47:32 0x0