H O S T I N T E R F A C E
Data Device Corporation
DS-BU-67301B-G
1/14
67
Figure 27. Synchronous, Non-Multiplexed Address 16-bit - Single-Word Register Read
Timing
Figure 27 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. For 16-bit accesses, CPU_WORD_EN[1:0] must be ‘11’ through the full
transfer cycle.
3. For a register read access, CPU_nSTOP asserts (low) simultaneous with
nDATA_RDY, and de-asserts (high) on the host clock cycle following
nSELECT returning high.
CPU_nLAST
nDATA_RDY
nSELECT
CPU_ADDR
nDATA_STRB
CPU_DATA
HOST_CLK
CPU_nSTOP
RD_nWR
CPU_WORD_EN[1:0]
MEM_nREG
MSW_nLSW
tDD
tCLK
Data A
tWait
tWait
Data B
tRDD
tRDD
tRDD
tRDD
tOHZ
tOH
tOHZ
tOH
tDD
tSS
tCS
tSS
tCS
tCH
tCH
tSH
tSH
tSTPD
tSTPD
tSTPD
tSTPD
Address
tAS
tAS
tAS
tAS
tAS
tAS
tAH
tAH
tAH
tAH
tSHC