SBPH400-3 datasheet(14/43 Pages) STMICROELECTRONICS

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SBPH400-3

Figure 2.6

Remote access packet format

Figure 2.7

Remote reply packet format

The fields in the remote access and remote reply packets are interpreted as shown in Table

2.3.

2.7.7 Remote Command and Confirmation packets

The SBPH400 responds to remote command packets by initiating the appropriate action and

immediately sending a remote confirmation packet.

Figure 2.8

Remote command packet format

Table 2.3

Remote Access and Remote Reply packet fields

Field

Comment

phy_ID

Physical node identifier of the destination of the packet (type = 1 or 5)

Physical node identifier of the source of the packet (type = 3 or 7)

type

1 - register read of the base registers

3 - register contents (base registers)

5 - register read of the paged registers

7 - register contents (paged registers)

page

0 - Port Status Page

1 - Product Identification Page

2-7 - (these pages not implemented, always responds with zero)

port

Identify the port for the selected register page. For values 0, 1 and 2, the page is as

defined in Table 2.17. For all other values the SBPH400 always responds with zero.

reg

If type = 1, then reg directly addresses one of the base registers.

If type = 5, then reg addresses 10002+reg in the selected page and port.

data

Current value of the SBPH400 register addressed by the immediately preceding Remote

Access packet (reserved and unimplemented fields and registers are returned as zero).

0 0

phy_ID

logical inverse of first quadlet

port

reg

reserved

page

type

0 0

phy_ID

logical inverse of first quadlet

port

reg

data

page

type

0 0

phy_ID

logical inverse of first quadlet

port

0000

cmnd

000

type(8)

0000

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