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DM9013 数据表(PDF) 24 Page - Davicom Semiconductor, Inc. |
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DM9013 数据表(HTML) 24 Page - Davicom Semiconductor, Inc. |
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24 / 75 page ![]() DM9013 3-port switch with Processor Interface 24 Preliminary datasheet DM9013-15-DS-P03 April 9, 2009 6.17 RX Additional Status Register ( 26H ) Bit Name Default Description 7:4 RESERVED 0,RO Reserved 1:0 RPTRS PH,RO uP received pointer status, only available when RX pointer restriction is enabled ( Reg27h.7=0). 00: Within buffer 01: End of buffer 1x: Exceed buffer 6.18 RX Additional Control Register ( 27H ) Bit Name Default Description 7 RPRD PHS0,RW RX pointer restriction disable 6:0 RESERVED 0,RO Reserved 6.19 Vendor ID Register (28H~29H) Bit Name Default Description 7:0 VIDH PE,0AH,RO Vendor ID High Byte (29H) 7:0 VIDL PE,46H.RO Vendor ID Low Byte (28H) 6.20 Product ID Register (2AH~2BH) Bit Name Default Description 7:0 PIDH PE,90H,RO Product ID High Byte (2BH) 7:0 PIDL PE,13H.RO Product ID Low Byte (2AH) 6.21 Chip Revision Register (2CH) Bit Name Default Description 7:0 CHIPR P01H,RO CHIP Revision 6.22 Transmit Control Register 2 (2DH) Bit Name Default Description 7 RESERVED 0,RW Reserved, Clear to 0 in application. 6:5 RESERVED 0,RO Reserved 4 ONEPM P0,RW One Packet Mode When set, only one packet transmit command can be issued before transmit completed. When cleared, at most two packet transmit command can be issued before transmit completed. 3:0 RESERVED 0,RO Reserved 6.23 Transmit Check Sum Control Register (31H) Bit Name Default Description 7~3 RESERVED 0,RO Reserved 2 UDPCSE HP0,RW UDP Checksum Generation Enable 1 TCPCSE HP0,RW TCP Checksum Generation Enable 0 IPCSE HP0,RW IP Checksum Generation Enable |
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