Datasheet

XIO2213B

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SCPS210F –OCTOBER 2008–REVISED MAY 2013

Table 10-2. Base Register Field Description (continued)

FIELD SIZE TYPE DESCRIPTION

Max_Legacy_S 3 Rd Maximum legacy path speed. This field holds the maximum speed capability of any legacy node (IEEE

PD Std 1394a-2000 or 1394-1995 compliant) as indicated in the self-ID packets received during bus

initialization. Encoding is the same as for the PHY_SPEED field (but limited to S400 maximum).

BLINK 1 Rd Beta-mode link. This bit indicates that a beta-mode-capable LLC section is attached to the PHY section.

This bit is set by the BMODE input terminal on the XIO2213B and should be set to 1.

Bridge 2 Rd/Wr Bridge. This field controls the value of the bridge (brdg) field in the self-ID packet. The power reset value

is 0. Details for when to set these bits are specified in the IEEE Std 1394.1 bridging specification.

Page_Select 3 Rd/Wr Page select. This field selects the register page to use when accessing register addresses 8-15. This

field is reset to 0 by a hardware reset and is unaffected by bus reset.

Port_Select 4 Rd/Wr Port select. This field selects the port when accessing per-port status or control (for example, when one

of the port status/control registers is accessed in page 0). Ports are numbered starting at 0. This field is

reset to 0 by hardware reset and is unaffected by bus reset.

The port status page provides access to configuration and status information for each of the ports. The

port is selected by writing 0 to the Page_Select field and the desired port number to the Port_Select field

in base register 7. Table 10-3 shows the configuration of the port-status page registers, and Table 10-4

gives the corresponding field descriptions. If the selected port is not implemented, all registers in the port

status page are read as 0.

Table 10-3. Page 0 (Port Status) Register Description

BIT POSITION

ADDRES

0 1 2 3 4 5 6 7

1000 Astat Bstat Ch Con RxOK Dis

1001 Negotiated_speed PIE Fault Standby_fault Disscrm B_Only

1010 DC_connected Max_port_speed (011b) LPP Cable_speed

1011 Connection_unreliable Reserved Beta_mode Reserved

1100 Port_error

1101 Reserved Loop_disable In_standby Hard_disable

1110 Reserved

1111 Reserved

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