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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AX88796ALF датащи(PDF) 65 Page - ASIX Electronics Corporation |
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AX88796ALF датащи(HTML) 65 Page - ASIX Electronics Corporation |
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65 / 68 page  65 AX88796ALF 3-in-1 Local Bus Fast Ethernet Controller Copyright © 2006-2013 ASIX Electronics Corporation. All rights reserved. Appendix C: Notice of AX88796A 1. AX88796A supported 68K CPU with word mode only when read/write DP MC68008 has only 8-bit data bus, so AX88796A can’t support this 68K CPU. 2. The main difference between AX88796A and AX88796 are: a) 4 Pins assignment in 68K bus mode (PIN4, 18, 19 and 22) AX88796A AX88796 PIN 4 NC /LDS PIN 18 /LDS R/W PIN 19 /UDS NC PIN 22 R/W /UDS *Note: On 68K applications, AX88796A can’t replace AX88796 directly. b) Change some pins as NC. AX88796A * AX88796 PIN 13 NC VDD PIN 14 NC VSS PIN 40 NC VDD PIN 45 NC BIST PIN 46 NC IDDQ PIN 57 NC VDD PIN 75 NC VSSA PIN 77 NC VSSM PIN 90 NC VSSO PIN 94 NC VSS *Note: These AX88796A NC pins are disconnected inside. c) Supported auto load MAC address from external 16-bit mode 93C56/93C66 EEPROM NE2000 driver will read the I/O mode field (offset 1CH and 1EH) of PROM contents to decide the I/O mode (8-bit mode or 16-bit mode). The I/O mode will be 16-bit mode if the value is 57H, 8-bit mode if 42H. AX88796A also supports user defined PROM 1CH and 1EH value by EEDO pin if no programmed EEPROM on board. User can pull-down 10K-ohm at EEDO pin to set 57H to the offset 1CH and 1EH of PROM. It will be 42H if no connection at EEDO pin. d) PTX and TXE status report when transmit collision 16 times e) MAC duplex can auto control by internal PHY MR0 bit 8 f) AX88796A does not support power MAC/PHY feature g) AX88796A only accept MII station management frames with correct 32-bit preamble h) REXT10, REXT100 (pin 84 and 83) AX88796A AX88796 PIN 84 REXT10 No external resistor needed. REXT10 An external resistor 20k ohm is placed from this signal to ground PIN 83 REXT100 No external resistor needed. REXT100 An external resistor 2.49k ohm is placed from this signal to ground *Note: AX88796A Pin 84 is disconnected inside and Pin 83 can be floating or pulled down. |
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