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參數(shù)資料
| 型號(hào)： | AM79C930VCW |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | PCnet-Mobile Single-Chip Wireless LAN Media Access Controller |
| 中文描述： | 2 CHANNEL(S), LOCAL AREA NETWORK CONTROLLER, PQFP144 |
| 封裝： | TQFP-144 |
| 文件頁(yè)數(shù)： | 99/161頁(yè) |
| 文件大小： | 691K |
| 代理商： | AM79C930VCW |
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P R E L I M I N A R Y
AMD
99
Am79C930
5
RXFOR
0
Receive FIFO Overrun. This bit is set whenever the RX FIFO expe-
riences an overrun. This bit is cleared by resetting the RX FIFO.
Receive FIFO Count. These bits indicate the current count of the
number of bytes contained in the RX FIFO. The RX FIFO holds 15
bytes. An RXFC value of “0h” indicates an empty RX FIFO. An
RXFC value of “Fh” indicates a full RX FIFO.
RX Busy. This bit is set to 1 by the Am79C930 device when the RXS
bit of TIR16 is set to a one, and remains set until the RXRES bit of
TIR16 is set to a one, or until any other global reset is activated
(e.g., RESET pin of Am79C930 asserted or the CORESET bit of
SIR0 is set).
4–1
RXFC[3:0]
0
0
RXBSY
0
TIR18: RX FIFO Data Register
This register is the RX FIFO Data register. This register
allows direct access to the RX FIFO in the TAI. When
read, the RX FIFO read pointer is automatically
incremented. When written, the RX FIFO write pointer is
automatically incremented.
Bit
Name
Reset Value
Description
7:0
RXF[7:0]
–
Receive FIFO data port. When read, data is removed from the sys-
tem side of the receive FIFO. When written, data is placed into the
network side of the receive FIFO. Writes to this register should be
for diagnostic purposes only and will not be necessary during nor-
mal operation. RX FIFO write and read pointers are automatically
incremented when writes and reads occur, respectively.
TIR19: Reserved
This register is reserved.
Bit
Name
Reset Value
Description
7–0
Reserved
–
Reserved. Must be written as a 0. Reads of these bits produce
undefined data.
TIR20: CRC32 Correct Byte Count LSB
This register is the CRC32 Correct Byte Count
LSB register.
Bit
Name
Reset Value
Description
7–0
C32C[7:0]
–
CRC32 Correct Count. The value in this register indicates the lower
8 bits of the 12-bit byte position when the CRC32 value was last cor-
rect. CRC32 value 001h corresponds to the first byte of the received
message following the Start of Frame Delimiter. If the value in this
register (and TIR21) does not match the length value indicated in
the frame header (plus overhead for PHY and MAC headers and
CRC) for frames that employ 32-bit CRC values, then the frame
should be rejected by the MAC firmware. Note that all bytes begin-
ning with the first byte following the Start of Frame Delimiter and in-
cluding the CRC bytes are included in the CRC32 Correct Count
value, but the bytes that are included in the CRC32 calculation are
dependent upon the setting of the PFL bits of TCR3.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM79C940VCW | Media Access Controller for Ethernet (MACE) |
| AM79C940 | Media Access Controller for Ethernet (MACE) |
| AM79C940JCW | Media Access Controller for Ethernet (MACE) |
| AM79C940KCW | Media Access Controller for Ethernet (MACE) |
| AM79C960 | PCnetTM-ISA Single-Chip Ethernet Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C940 | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Media Access Controller for Ethernet (MACE) |
| AM79C940_00 | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Media Access Controller for Ethernet (MACE⑩) |
| AM79C940-16/25 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| AM79C940-16JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Node Controller |
| AM79C940-25JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Node Controller |
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