Sundance Spas ST201 manual Asicctrl, BIT BIT Name

Sundance Technology

ST201

PRELIMINARY draft 2

ASICCTRL
Class	I/O Registers, Control and Status
Base Address	IoBaseAddress register value
Address Offset	0x30
Access Mode	Read/Write
Width	32 bits

AsicCtrl provides chip-specific, non-host-related settings. The contents of the least significant byte of Asic- Ctrl are read from EEPROM at reset.

BIT

0

1

2

3

4

5

6

7

BIT NAME

Reserved

ExpRomSize

TxLargeEnable

RxLargeEnable

ExpRomDisable

PhySpeed10

PhySpeed100

PhyMedia

BIT DESCRIPTION

Reserved for future use. Should be set to 0.

Specifies the size of the Expansion ROM installed on the adapter, as follows:

0 = 32 kB (default after reset)

1 = 64 kB

This read/write bit, when set, enables transmission of frames that are larger than the TxFIFO. Since ST201’s TxFIFO size is 2KB, this bit can be left clear (the reset default).

This read/write bit, when set, enables reception of frames that are larger than the RxFIFO. Since ST201’s RxFIFO size is 2KB, this bit can be left clear (the reset default).

This bit, when set, disables accesses to the on-adapter Expansion ROM. This bit is included to allow bypassing the Expansion ROM with- out having to physically remove it from the board. When this bit is set, the ST201 responds to any read in its configured Expansion ROM space by returning 00000000h, and it ignores writes to the Expansion ROM. This bit resets to 0.

This read-only bit, when set, indicates the 10Mb/s operation is avail- able from the PHY on the adapter. “0”indicates the PHY is not 10Mb/s capable.

This read-only bit, when set, indicates the 100Mb/s operation is avail- able from the PHY on the adapter. “0”indicates the PHY is not 100Mb/ s capable.

This read-only bit indicates the media type that is available on the adapter. “0”indicates twisted-pair media, and “1”indicates fiber media. The combination of PhyMedia, PhySpeed100, and PhySpeed10 will determine the capability of the adapter. For example, [7,6,5] =

000: undefined

001:10BASE-T PHY

010:100BASE-T PHY

011:10BASE-T and 100BASE-T dual-speed PHY

100:undefined

101:10BASE-F PHY

110:100BASE-F PHY

111:10BASE-F and 100BASE-F dual-speed PHY

45