H O S T I N T E R F A C E
Data Device Corporation
DS-BU-67301B-G
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Figure 32. Synchronous, Multiplexed Address 32-bit Single-Word Write Timing
Figure 32 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 word(s) are to be written. If either or both these bits is ‘0’, then the
corresponding 16-bit word(s) will not be written. 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 write accesses, and will remain high.
CPU_nSTOP
nDATA_RDY
CPU_DATA
CPU_WORD_EN[1:0]
RD_nWR
MEM_nREG
ADDR_LAT
nDATA_STRB
nSELECT
HOST_CLK
tAH
tAH
tDS
tCLK
tRDD
tRDD
tAS
tAH
tALS
tALH
tCS
tSH
tSS
tCH
Data
Address
tAS
tAS
tAS
tAH
tWait
tSHC
tDS
CPU_nLAST