Altera Embedded Peripherals IP Instrukcja Użytkownika Strona 34

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Table 3-4: Avalon-MM Slave Interface Signals
Signal Width Direction Description
avs_read
1 Input Avalon-MM read control.
Asserted to indicate a read
transfer. If present, readdata
is required.
avs_write
1 Input Avalon-MM write control.
Asserted to indicate a write
transfer. If present,
writedata is required.
avs_byteenable dqm_width
Input Enables specific byte lane(s)
during transfer. Each bit
corresponds to a byte in avs_
writedata and avs_
readdata.
avs_address controller_addr_
width
Input Avalon-MM address bus.
avs_writedata sdram_data_width
Input Avalon-MM write data bus.
Driven by the bus master
(bridge unit) during write
cycles.
avs_readdata sdram_data_width
Output Avalon-MM readback data.
Driven by the altera_spi
during read cycles.
avs_readdatavalid
1 Output Asserted to indicate that the
avs_readdata signals
contains valid data in
response to a previous read
request.
avs_waitrequest
1 Output Asserted when it is unable to
respond to a read or write
request.
3-4
Interface
UG-01085
2014.24.07
Altera Corporation
Tri-State SDRAM
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