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IP82C237 Datasheet(PDF) 14 Page - Intersil Corporation

Part # IP82C237
Description  CMOS High Performance Programmable DMA Controller
PDF  25 Pages
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

IP82C237 Datasheet(HTML) 14 Page - Intersil Corporation

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4-161
82C237
CHANNEL
REGISTER
OPERATION
SIGNALS
FIRST/LAST
FLIP-FLOP
STATE
DATA
BUS
DB0-DB7
CS
IOR
IOW
A3A2A1A0
0
Base and Current Address
Write
0100000
0
A0-A7
0100000
1
A8-A15
Current Address
Read
0010000
0
A0-A7
0010000
1
A8-A15
Base and Current Word
Count
Write
0100001
0
W0-W7
0100001
1
W8-W15
Current Word Count
Read
0010001
0
W0-W7
0010001
1
W8-W15
1
Base and Current Address
Write
0100010
0
A0-A7
0100010
1
A8-A15
Current Address
Read
0010010
0
A0-A7
0010010
1
A8-A15
Base and Current Word
Count
Write
0100011
0
W0-W7
0100011
1
W8-W15
Current Word Count
Read
0010011
0
W0-W7
0010011
1
W8-W15
2
Base and Current Address
Write
0100100
0
A0-A7
0100100
1
A8-A15
Current Address
Read
0010100
0
A0-A7
0010100
1
A8-A15
Base and Current Word
Count
Write
0100101
0
W0-W7
0100101
1
W8-W15
Current Word Count
Read
0010101
0
W0-W7
0010101
1
W8-W15
3
Base and Current Address
Write
0100110
0
A0-A7
0100110
1
A8-A15
Current Address
Read
0010110
0
A0-A7
0010110
1
A8-A15
Base and Current Word
Count
Write
0100111
0
W0-W7
0100111
1
W8-W15
Current Word Count
Read
0010111
0
W0-W7
0010111
1
W8-W15
FIGURE 6. WORD COUNT AND ADDRESS REGISTER COMMAND CODES



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