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DP83907 Datasheet(PDF) 54 Page - National Semiconductor (TI) |
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DP83907 Datasheet(HTML) 54 Page - National Semiconductor (TI) |
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54 / 70 page  60 Operation of DP83907 (Continued) 8-Bit IO Slave Read TLF12082 – 36 This is the type of cycle used to read from a register or in 8-bit mode from a data transfer port These accesses are entirely asynchronous with the DP83907 responding when it decodes the correct address on SA0-9 and an IORD If AEN is high the cycle will be ignored CHRDY is deasserted if the DP83907 is not ready to respond and asserted when ready If it is ready immediately CHRDY is not deasserted The data will always appear on SD0-7 8-Bit IO Slave Write TLF12082 – 37 This is the type of cycle used to write to a register or in 8-bit mode to a data transfer port These accesses are entirely asynchronous with the DP83907 responding when it decodes the correct address on SA0-9 and an IOWR If AEN is high the cycle will be ignored CHRDY is deasserted if the DP83907 is not ready to respond and asserted when ready If it is ready immediately CHRDY is not deasserted The data will always be taken from SD0-7 54 |
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