LAN9217_07 Datasheet, PDF (91/137 Pages) SMSC Corporation – 16-bit High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX

16-bit High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX
Datasheet
5.3.16 GPT_CNT-General Purpose Timer Current Count Register
Offset:
90h
Size:
This register reflects the current value of the GP Timer.
32 bits
BITS
DESCRIPTION
31-16 Reserved
15-0 General Purpose Timer Current Count (GPT_CNT). This 16-bit field
reflects the current value of the GP Timer.
TYPE
RO
RO
DEFAULT
-
FFFFh
5.3.17 WORD_SWAP—Word Swap Control
Offset:
98h
Size:
32 bits
This register controls how words from the host data bus are mapped to the CSRs and Data FIFOs
inside the LAN9217. The LAN9217 always sends data from the Transmit Data FIFO to the network so
that the low order word is sent first, and always receives data from the network to the Receive Data
FIFO so that the low order word is received first.
BITS
DESCRIPTION
31:0 Word Swap. If this field is set to 00000000h, or anything except
0xFFFFFFFFh, the LAN9217 maps words with address bit A[1]=1 to the
high order words of the CSRs and Data FIFOs, and words with address bit
A[1]=0 to the low order words of the CSRs and Data FIFOs. If this field is
set to 0xFFFFFFFFh, the LAN9217 maps words with address bit A[1]=1 to
the low order words of the CSRs and Data FIFOs, and words with address
bit A[1]=0 to the high order words of the CSRs and Data FIFOs.
TYPE
R/W
NASR
DEFAULT
00000000h
SMSC LAN9217
91
DATASHEET
Revision 1.8 (06-06-07)