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LAN91C111 Datasheet(PDF) 90 Page - Microchip Technology |
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LAN91C111 Datasheet(HTML) 90 Page - Microchip Technology |
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90 / 125 page  2011-2016 Microchip Technology Inc. DS00002276A-page 91 LAN91C111 D0-D31 D0-D31 32 bit data bus. The bus byte(s) used to access the device are a function of nBE0-nBE3: Not used = tri-state on reads, ignored on writes. Note that nBE2 and nBE3 override the value of A1, which is tied low in this application. nLDEV nLDEV nLDEV is a totem pole output. nLDEV is active on valid decodes of A15- A4 and AEN=0. Unused Pins VCC nRD nWR GND A1 nVLBUS OPEN nDATCS TABLE 12-1: VL LOCAL BUS SIGNAL CONNECTIONS (CONTINUED) VL Bus Signal LAN91C111 Signal Notes nBE0 nBE1 nBE2 nBE3 0 0 0 0 Double word access 0 0 1 1 Low word access 1 1 0 0 High word access 0 1 1 1 Byte 0 access 1 0 1 1 Byte 1 access 1 1 0 1 Byte 2 access 1 1 1 0 Byte 3 access |
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