11

MUlTIPROTOCOl XFP OPTICAl TRANSCEIvER

—1310 NM FOR UP TO 10 KM REACH

3.8

XFP Two-wire Interface Protocol and Management Interface

The 10 Gbps 1310 nm multiprotocol XFP optical transceiver incorporates a XFP

compliant two-wire management interface which is used for serial ID, digital

diagnostics, and certain control functions. It is modeled on the SFF-8472 Rev

9.3 specification modified to accommodate a single two-wire interface address.

In addition to the basic I2C read/write functionality, the modules support packet

error checking that, when enabled, allows the host system to confirm the validity

of any read data. Details of the protocol and interface are explicitly described in the

MSA. Please refer to the MSA for design reference.

Figure 5

XFP two-wire serial digital diagnostic memory map

Two-wire Serial Address

1010000x (A0H)

Digital

Diagnostic

Functions

4 Byte Password Change

4 Byte Password Entry

Page Select Byte Entry

0-

118

119-122

126

127

User

EEPROM

Data

XFP MSA

Serial ID

Data

Vendor Specific

ID Data

Reserved

For Future

Diagnostic

Functions

Vendor

Specific

Functions

Reserved

128-

255

128-

128-

128-

128-

255

255

255

255

223

224-

Table 00H

Table 01H

Table 02H

Table 03H-7FH

Table 80H-FFH