參數(shù)資料
型號: AM79C930
廠商: Advanced Micro Devices, Inc.
英文描述: PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
中文描述: PCnet -移動單芯片無線局域網(wǎng)媒體接入控制器
文件頁數(shù): 100/161頁
文件大?。?/td> 691K
代理商: AM79C930
AMD
P R E L I M I N A R Y
100
Am79C930
TIR21: CRC32 Correct Byte Count MSB
This register is the CRC32 Correct Byte Count
MSB register.
Bit
Name
Reset Value
Description
7–4
Reserved
Reserved. Must be written as a 0. Reads of this bit produce
undefined data.
CRC32 Correct Count. The value in this register indicates the upper
4 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 TIR20) 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.
3–0
C32C[11:8]
TIR22: CRC8 Correct Byte Count LSB
This register is the CRC8 Correct Byte Count
LSB register.
Bit
Name
Reset Value
Description
7–0
C32C[7:0]
CRC8 Correct Count. The value in this register indicates the lower 8
bits of the 12-bit byte position when the CRC8 value was last cor-
rect. CRC8 value 001h corresponds to the first byte of the received
message following the Start of Frame Delimiter. If the value in this
register (and TIR22) does not match the length value indicated in
the frame header (plus overhead for PHY and MAC headers and
CRC) for frames that employ 8-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 CRC8 Correct Count
value, but the bytes that are included in the CRC8 calculation are
dependent upon the setting of the PFL bits of TCR3.
TIR23: CRC8 Correct Byte Count MSB
This register is the CRC8 Correct Byte Count
MSB register .
Bit
Name
Reset Value
Description
7–4
Reserved
Reserved. Must be written as a 0. Reads of this bit produce
undefined data.
CRC8 Correct Count. The value in this register indicates the upper
4 of the 12-bit byte position when the CRC8 value was last correct.
CRC8 value 001h corresponds to the first byte of the received mes-
sage following the Start of Frame Delimiter. If the value in this regis-
ter (and TIR22) does not match the length value indicated in the
frame header (plus overhead for PHY and MAC headers and CRC)
for frames that employ 8-bit CRC values, then the frame should be
rejected by the MAC firmware. Note that all bytes beginning with the
first byte following the Start of Frame Delimiter and including the
CRC bytes are included in the CRC8 Correct Count value, but the
bytes that are included in the CRC8 calculation are dependent upon
the setting of the PFL bits of TCR3.
3–0
C8C[11:8]
相關PDF資料
PDF描述
AM79C930VCW PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
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)
相關代理商/技術參數(shù)
參數(shù)描述
AM79C930EVAL-HW 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Am79C930EVAL-HW - PCnet-Mobile Evaluation Kit
AM79C930VC/W 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
AM79C930VCW 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-Mobile Single-Chip Wireless LAN Media Access Controller
AM79C940 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Media Access Controller for Ethernet (MACE)