ISL35822 Datasheet, PDF (26/75 Pages) Intersil Corporation – Octal 2.488Gbps to 3.187Gbps/ Lane Retimer

ISL35822
Table 22. XENPAK NVR REGISTER COPY
MDIO XENPAK/XPAK/X2 NVR REGISTER ADDRESSES = 1.32775:33030 (1.8007:8106’h)
BYTE ADDRESS
DEC
HEX
NAME
1.32775 to 1.8007 to NVR Register
1.32817 1.8031 Copy
1.32818 to 1.8032 to PKG OUI
1.32821 1.8035
1.32822 to 1.8036 to NVR Register
1.32889 1.8079 Copy
1.32890 1.807A DOM Ctrl
1.32891
1.32892
1.807B
1.807C
NVR Reg Copy
1.32893 1.807D Basic Chksm
1.32894 to 1.807E to NVR Register
1.32940 1.80AC Copy
1.32941 1.80AD Cstm Chksm
1.32942 to 1.80AE to NVR Register
1.33027 1.8103 Copy
1.33028 1.8104 A/C Size
1.33029 1.8105 A/C Pointer
1.33030 1.8106 Vndr Chksm
DESCRIPTION⁽¹⁾
XENPAK NVR Register Copies
SUGGESTED VALUE R/W
R/W⁽²⁾
XENPAK/XPAK/X2 Package OUI (bits 3 to Xenpak = 0008BE
24)
XPAK = 000ACB
X2 = 000C64
XENPAK NVR Register Copies
R/W⁽²⁾
R/W⁽²⁾
DOM Capability Bits
XENPAK NVR Register Copies
R/W⁽²⁾
R/W⁽²⁾
Basic Field Checksum⁽³⁾
Customer Writable Area⁽⁴⁾
Σ(1.8007:807C)
R/W⁽²⁾
Customer Area Checksum⁽⁵⁾
Vendor Specific Area
Σ(1.807E:80AC)
R/W⁽²⁾
Auto-configure Size (N)
Auto-configure Pointer (S)
Vendor Specific Checksum⁽⁶⁾
See page 16
(or 00 or FF’h)
Σ(1.80AE:8105)
DETAILS
Mirrored to 1.14:15
(1.E:F’h)
Table 23
See Table 92
Note (1): Only register values operated on by the ISL35822 are individually listed. The others are merely copied from the I²C NVR space.
Note (2): Although data can be written to these registers, it will be volatile, unless the ‘Write NVR’ operation as specified in “Writing EEPROM Space through the I2C
Interface” on page 19 is performed.
Note (3): Checksum to be calculated from 1.8007’h to 1.807C’h. Host can check for validity.
Note (4): If WRTP pin is high, this is the only area that can be written by the user. See also Note (2) above.
Note (5): Checksum to be calculated from 1.807E’h to 1.80AC’h.
Note (6): Checksum to be calculated from 1.80AE’h to 1.8105’h.
Table 23. XENPAK DIGITAL OPTICAL MONITORING (DOM) CAPABILITY REGISTER
MDIO (XENPAK) REGISTER, ADDRESS = 1. 32890 (1. 807A’h)
SUGGESTED
BIT
NAME
SETTING
VALUE⁽¹⁾ R/W⁽³⁾
DESCRIPTION
1.32890.15:8
Reserved
000’h
1.32890.7
1.32890.6
1.32890.5
DOM Ctrl Reg
DOM system
Lane-by Lane
1 = Implemented 1’b
0 = Not
implemented
1’b
1’b
R/W
DOM Control/Status Register 1.A100’h
R/W
DOM Implemented
R/W
WDM Lane-by-Lane DOM; registers 1.A0C0:A0FF’h
valid
1.32890.4
LBC Scale
1 = 10µA
0 = 2µA
R/W
Laser Bias Scale Factor
1.32890.3
1.32890.2:0
Reserved
DOM Address
001’b
R/W
I²C Device Address of (initial) DOM IC⁽²⁾
Note (1): Suggested values are given, for a full LX4 module with four individual-lane DOM circuits, at least one having the DOM data at Device Address A2’h.
Note (2): Last three significant bits of the (default) DOM I²C Device Address (NB LSB is a read/write flag). Upper bits are assumed to be ‘1010’b, Device address will be
(A0’h + 2*(<1.32890.2:0>). A device MUST be present at this address for correct operation if bit 6 is set.
Note (3): Although data can be written to this register, it should only be done for writing the NVR, using the ‘Write NVR’ operation as specified in “Writing EEPROM Space
through the I2C Interface” on page 19. The values here should normally only be loaded from the NVR, since they could affect the operation of the ISL35822 if
incorrect.
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