H O S T I N T E R F A C E
Data Device Corporation
DS-BU-67301B-G
1/14
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Figure 25. Synchronous, Non-Multiplexed Address - 32-bit Single-Word Write Timing
Figure 25 Notes:
1. When nSELECT is asserted (low), the
Total-AceXtreme®
is selected for this
data transfer. nSELECT must be asserted through the full transfer cycle, and
de-asserted high at the end of the transfer.
2. The CPU_WORD_EN[1:0] inputs are used to specify which 16-bit data
memory words are to be written. If either or both these bits is ‘0’, then the
corresponding 16-bit word(s) will not be written to
Total-AceXtreme
memory.
These inputs should be tied high if unused. For register transfers, the value of
CPU_WORD_EN[1:0] must be ‘11’.
3. Unless the
Total-AceXtreme
command FIFO is full, CPU_nSTOP is not
asserted for memory accesses, and will remain high.
nDATA_RDY
CPU_DATA
CPU_WORD_EN[1:0]
RD_nWR
MEM_nREG
CPU_ADDR
nDATA_STRB
nSELECT
HOST_CLK
CPU_nSTOP
tDH
tDS
tAS
tCLK
Address
tRDD
tRDD
tSH
tSS
tCS
tCH
Data
tWait
tAS
tAS
tAS
tAH
tAH
tAH
tAH
tSHC
CPU_nLAST