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DP83936AVF Datasheet(PDF) 37 Page - National Semiconductor (TI) |
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DP83936AVF Datasheet(HTML) 37 Page - National Semiconductor (TI) |
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37 / 104 page  60 SONIC-T Registers (Continued) 63 STATUSCONTROL REGISTERS This set of registers is used to convey statuscontrol infor- mation tofrom the host system and to control the operation of the SONIC-T These registers are used for loading com- mands generated from the system indicating transmit and receive status buffering data tofrom memory and provid- ing interrupt control The registers are selected by asserting chip select to the SONIC-T and providing the necessary ad- dress on register address pins RA5 – RA0 Tables 6-1 6-2 and 6-3 show the locations of all SONIC-T registers and where information on the registers can be found in the data sheet TABLE 6-1 User Registers RA5 – RA0 Access Register Symbol Description (section) COMMAND AND STATUS REGISTERS 00h RW Command CR 641 01 (Note 3) RW Data Configuration DCR 642 02 RW Receive Control RCR 643 03 RW Transmit Control TCR 644 04 RW Interrupt Mask IMR 645 05 RW Interrupt Status ISR 646 3F (Note 3) RW Data Configuration 2 DCR2 647 TRANSMIT REGISTERS 06 RW Upper Transmit Descriptor Address UTDA 648 5441 07 RW Current Transmit Descriptor Address CTDA 648 553 RECEIVE REGISTERS 0D RW Upper Receive Descriptor Address URDA 649 5441 0E RW Current Receive Descriptor Address CRDA 649 5443 13 RW End of Buffer Word Count EOBC 649 542 14 RW Upper Receive Resource Address URRA 649 5441 15 RW Resource Start Address RSA 649 541 16 RW Resource End Address REA 649 541 17 RW Resource Read Pointer RRP 649 541 18 RW Resource Write Pointer RWP 649 541 2B RW Receive Sequence Counter RSC 649 5432 CAM REGISTERS 21 RW CAM Entry Pointer CEP 61 6410 22 (Note 1) R CAM Address Port 2 CAP2 61 6410 23 (Note 1) R CAM Address Port 1 CAP1 61 6410 24 (Note 1) R CAM Address Port 0 CAP0 61 6410 25 (Note 2) RW CAM Enable CE 61 6410 26 RW CAM Descriptor Pointer CDP 61 6410 27 RW CAM Descriptor Count CDC 61 6410 TALLY COUNTERS 2C (Note 4) RW CRC Error Tally CRCT 6411 2D (Note 4) RW FAE Tally FAET 6411 2E (Note 4) RW Missed Packet Tally MPT 6411 http www nationalcom 37 |
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