Sundance Spas ST201 - Manual (Page 8)

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Sundance Technology ST201 PRELIMINARY draft 2
COL INPUT Collision. COL is asserted by the PHY to a signal collision condition is
detected on the physical medium. COL is asynchronous to RXCLK and
TXCLK.
MDC OUTPUT Management Data Clock. MDC is used to synchronize the read and
write operations of MDIO.
MDIO IN/OUT Management Data Input/Output. MDIO carries management data for
the management port read and write operations.
PHY INTERFACE
PHYLNKN INPUT PHY Link Status, asserted LOW. PHYLNKN is driven by the physical
layer device. It is asserted to signal a functional link (link up).
PHYDPLXN INPUT PHY Duplex Status, assertion level is programmable (see I/O Regis-
ters, PhyCtrl bit 4). PHYDPLXN is driven by the physical layer device.
It is asserted to indicate a full duplex link, and de-asserted to indicate a
half duplex link. PHYDPLXN is undefined when PHYLNKN is not
asserted.
PHYSPDN INPUT PHY Speed Status. PHYSPDN is driven by the physical layer device. It
is asserted to indicate a 100Mbps link, and de-asserted to indicate a
10Mbps link. PHYSPDN is undefined when PHYLNKN is not asserted.
EEPROM INTERFACE
EEDO INPUT EEPROM Data Output. This pin is connected directly to the data output
of the EEPROM device. (This pin is shared with EA13)
EEDI OUTPUT EEPROM Data In. This pin is connected directly to the data input of the
EEPROM device. (This pin is shared with EA14)
EESK OUTPUT EEPROM Serial Clock. EESK is the clock used to synchronize the
EEPROM data access with EEDI and EEDO. It is connected directly to
the clock input of the EEPROM device. (This pin is shared with EA15)
EECS OUTPUT EEPROM Chip Select. EECS is asserted by the ST201 to access the
EEPROM. It is connected directly to the chip select input of the
EEPROM device.
EXPANSION ROM INTERFACE
ED[7..0] IN/OUT Expansion ROM Data. The ED[7..0] provide data access to the expan-
sion ROM.
EA[15..0] OUTPUT Expansion ROM Address. The EA[15..0] carry the address to the
expansion ROM.
EWEN OUTPUT Expansion ROM Write Enable.
EOEN OUTPUT Expansion ROM Output Enable.
LED DRIVERS
PIN NAME PIN TYPE PIN DESCRIPTION
TABLE 2: ST201 Pin Descriptions