H O S T I N T E R F A C E
Data Device Corporation
DS-BU-67301B-G
1/14
64
Figure 24. Synchronous, Non-Multiplexed Address - 32-bit Single-Word Register Read
Timing
Figure 24 Notes:
1. When nSELECT is asserted (low), the
Total-AceXtreme®
is selected for this
data transfer. nSELECT should be asserted throughout the entire transfer
cycle, and de-asserted high at the end of the transfer.
2. For register transfers, the value of the CPU_WORD_EN[1:0] inputs must be
‘11’.
3. For a single-word register read access, CPU_nSTOP asserts (low)
simultaneous with nDATA_RDY, and de-asserts (high) on the host clock cycle
following nSELECT returning high.
nDATA_RDY
CPU_DATA
CPU_WORD_EN[1:0]
RD_nWR
MEM_nREG
CPU_ADDR
nDATA_STRB
nSELECT
CPU_nSTOP
HOST_CLK
tOHZ
tOH
tSTPD
tDD
tSH
Address
tCLK
Data
tRDD
tRDD
tSTPD
tSS
tCS
tCH
tAS
tAS
tAS
tAS
tAH
tAH
tAH
tAH
tSHC
tWait
CPU_nLAST