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參數(shù)資料
| 型號： | W3100A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | i2Chip W3100A |
| 中文描述： | i2Chip W3100A |
| 文件頁數(shù)： | 36/63頁 |
| 文件大小： | 557K |
| 代理商： | W3100A |
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0x0000
0x2000
CH3
CH2
CH1
CH0
0x0800
0x1000
0x1800
0x0000
Since transmission
memory is 2KB, mask is
0x000007FF
0x0800
0x0000
When MCU records the
transmission data for transmission
and Cx_TW_PR is increased
0x0800
0x0200
Cx_TR_PR
Tx
data
0x0000
When W3100A completes
the transmission
0x0800
0x0200
Cx_TW_PR
IPL_RAW Transmission Pointer Management
2KB allocated at
each channel
Cx_TW_PR and
Cx_TR_PR are
equal
(0x00123000
assumed)
Cx_TW_PR is
increased to
0x00123200
(MCU)
Cx_TR_PR is
increased to
0x00123200
(W3100A)
Above diagram illustrates the change in Cx_TW_PR and Cx_TA_PR when actual data transmission is made
after 2KB of transmission memory is set at CH0.
IPL_RAW Mode Data Reception
Reception in W3100A’s IPL_RAW Mode is similar to UDP reception. As in UDP, header information is
included in the received data in addition to the data, and the header is structure as below.
TLEN
0
2
SIP
6
IP RAW data
xx
The header information IPL_RAW mode contains (1) TLEN identical to UDP TLEN displaying the total
length of data size + header length, and (2) 4Byte SIP displaying the sender IP that transmitted UDP data.
Both are used with Cx_RW_PR and Cx_RR_PR to process the received data. The process is made
identically to the UDP reception data processing.
5. MAC Layer RAW Mode
In MACL_RAW (MAC Layer RAW) mode, W3100A is used as other general NIC (Network Interface
Controller), and W3100A’s TCP/IP module is not used in this mode.
When TCP/IP is used through W3100A, the number of channels is limited to 4.
For systems using more than 4 channels simultaneously, W3100A uses this mode and S/W TCP/IP can be
processed in the higher drive.
If MAC Layer RAW Mode is used, W3100A uses Channel 0 only and other channels are ignored.
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