ISL35822 Datasheet, PDF (39/75 Pages) Intersil Corporation – Octal 2.488Gbps to 3.187Gbps/ Lane Retimer

ISL35822
IEEE PCS REGISTERS (3.0 TO 3.25/3.0019’H)
Table 57. IEEE PCS CONTROL 1 REGISTER
MDIO REGISTER ADDRESS = 3.0 (3.0000’h)
BIT(S)
NAME
SETTING
DEFAULT R/W
DESCRIPTION
3.0.15
1.0.15
4.0.15
Reset
1 = reset
0’b
0 = reset done, normal
operation
3.0.14⁽¹⁾
PCS_LB_EN
Optionally, enable PCS
0’b
Loopback, otherwise
reserved
R/W SC Writing 1 to this bit will reset the whole chip,
including the MDIO registers.
R/W
If enabled by EN_PCS_LB (see bit 3.C001’h.7,
Table 64) perform PCS Loopback, and is a R/W bit;
otherwise, effectively a reserved RO 0’b bit ⁽¹⁾.
3.0.13
Speed Select
1 = 10Gbps
1’b
RO
1 = bits 5:2 select speed
3.0.12
Reserved
00’h
3.0.11
LOPOWER
0 = Normal Power
0’b
R/W
No Low Power Mode, writes ignored
3.0.10:7
Reserved
3.0.6
Speed Select
1 = 10Gbps
1’b
RO
1 = bits 5:2 select speed
3.0.5:2
Speed Select
0000 = 10Gbps
0’h
RO
Operates at 10Gbps
3.0.1:0
Reserved
0’b
Note (1): This bit is not permitted to be a PCS loopback bit by IEEE 802.3ae-2002 subclause 45.2.3.1.2 in 10GBASE-X PCS devices. Intersil has submitted a
maintenance request (#1113) to allow that use of this bit. Many XENPAK hosts, however, expect this loopback (which is mandatory for 10GBASE-R PCS
devices). Setting the 3.C001’h.7 bit, (Table 64) will activate this loopback enable bit, but cause the ISL35822 to be non-conforming to the current 802.3
specification. See “Loopback Modes ” on page 13).
Table 58. IEEE PCS STATUS 1 REGISTER
MDIO REGISTER ADDRESS = 3.1 (3.0001’h)
BIT
NAME
SETTING
DEFAULT
R/W
DESCRIPTION
3.1.15:8 Reserved
00’h
3.1.7
Local Fault
1 = PCS Local Fault
0
RO
Derived from Register 3.0008’h
3.1.6:3
3.1.2
Reserved
Rx Link Up
1 = PCS Rx Link Up
0 = PCS Rx Link Down
0’h
1 ⁽¹⁾
RO LL⁽¹⁾
‘Up’ means CX4/LX4 signal level is OK, Byte
Synch and Lane-Lane Alignment have all
occurred
3.1.1
LoPwrAble
Low Power Ability
0
RO
Device does not support a low power mode
3.1.0
Reserved
0
Note (1): This bit is latched low on a detected Fault condition. It is set high on being read.
Table 59. IEEE PCS TYPE SELECT REGISTER
MDIO REGISTER ADDRESS = 3.7 (3.0007’h)
BIT
NAME
SETTING
DEFAULT
R/W
DESCRIPTION
3.7.15:2
3.7.1:0
Reserved
PCS Type
01 = 10GBASE-X
000’h
01b
RO⁽¹⁾
Writes ignored
Note (1): Although the 802.3ae specification describes this register as type R/W, this register cannot have any value other than that reflecting the 10GBASE-X PCS.
Thus writing any other value is ignored, and the register is in effect type RO.
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