H O S T I N T E R F A C E
Data Device Corporation
DS-BU-67301B-G
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Table 5. Asynchronous 16-bit Mode Configuration Options
TRIG_SEL
POL_SEL
RD_nWR
FIRST WORD
TRANSFER
SECOND WORD
TRANSFER
1
1
1
MSW_nLSW = 0
CPU
RAM 31:16
MSW_nLSW = 1
CPU
RAM 15:0
1
1
0
MSW_nLSW = 0
CPU
RAM 31:16
MSW_nLSW = 1
CPU
RAM 15:0
1
0
1
MSW_nLSW = 1
CPU
RAM 31:16
MSW_nLSW = 0
CPU
RAM 15:0
1
0
0
MSW_nLSW = 1
CPU
RAM 31:16
MSW_nLSW = 0
CPU
RAM 15:0
0
1
1
MSW_nLSW = 1
CPU
RAM 15:0
MSW_nLSW = 0
CPU
Buffer 31:16
0
1
0
MSW_nLSW = 1
CPU
RAM 15:0
MSW_nLSW = 0
CPU
RAM 31:16
0
0
1
MSW_nLSW = 0
CPU
RAM 15:0
MSW_nLSW = 1
CPU
RAM 31:16
0
0
0
MSW_nLSW = 0
CPU
RAM 15:0
MSW_nLSW = 1
CPU
RAM 31:16
6.3.1.2 Asynchronous Mode Connection Diagrams
Figure 7 through Figure 10 show the four possible Asynchronous mode interface
configurations, including the four combinations of 32-bit, 16-bit, non-multiplexed, and
multiplexed.