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參數(shù)資料
| 型號(hào)： | RTL8019AS |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Realtek Full-Duplex Ethernet Controller with Plug and Play Function (RealPNP) |
| 中文描述： | 瑞昱全雙工以太網(wǎng)控制器即插即用功能（RealPNP） |
| 文件頁數(shù)： | 13/50頁 |
| 文件大?。?/td> | 992K |
| 代理商： | RTL8019AS |
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8019AS.doc
2001-05-10
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SPECIFICATION
RTL8019AS
13
IMR:
Interrupt Mask Register (0FH; Type=W in Page0, Type=R in Page2)
All bits correspond to the bits in the ISR register. POWER UP=all 0s. Setting individual
bits will enable the corresponding interrupts.
DCR:
Data Configuration Register (0EH; Type=W in Page0, Type=R in Page2)
Bit
7
6, 5
4
Symbol
-
FT1, FT0
ARM
Description
Always 1
FIFO threshold select bit 1 and 0.
Auto-initialize Remote
0: Send Packet Command not executed.
1: Send Packet Command executed.
Loopback Select
0: Loopback mode selected. Bits 1 and 2 of the TCR must also be
programmed for Loopback operation.
1: Normal Operation
This bit must be set to zero. NIC only supports dual 16-bit DMA mode.
POWER UP =1
Byte Order Select (Not implement)
0: MS byte placed on MD15-8 and LS byte on MD7-0. (32xxx,80x86)
1: MS byte placed on MD7-0 and LS byte on MD15-8. (680x0)
Word Transfer Select
0: byte-wide DMA transfer
1: word-wide DMA transfer
3
LS
2
LAS
1
BOS
0
WTS
TCR:
Transmit Configuration Register (0DH; Type=W in Page0, Type=R in Page2)
Bit
7
6
5
4
3
Symbol
-
-
-
OFST
ATD
Description
Always 1
Always 1
Always 1
Collision Offset Enable.
Auto Transmit Disable.
0: normal operation
1: reception of multicast address hashing to bit 62 disables transmitter,
reception of multicast address hashing to bit 63 enables transmitter.
LB1
LB0
Mode
0
0
0
1
1
0
1
1
The NIC CRC logic comprises a CRC generator for transmitter and a CRC checker for
receiver. This bit controls the activity of the CRC logic. If this bit set, CRC is inhibited by
transmitter. Otherwise CRC is appended by transmitter.
Conditions
CRC Logic Activities
CRC Bit
Mode
CRC Generator
0
normal
enabled
1
normal
disabled
0
loopback
enabled
1
loopback
disabled
2, 1
0
LB1, LB0
CRC
Remark
0
1
2
3
Normal Operation
Internal Lookback
External Lookback
External Lookback
CRC Checker
enabled
enabled
disabled
enabled
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