IEEE 488.2 Controller Chip
+5 V
CPU(80186)
DRQ
RD*
WR*
INT0
RESET
OSC
AD15-0
DEN
DT/R
74245
NAT9914
75160
ACCRQ*
DBIN
WE*
INT*
RESET*
CLK
D7-0
TE
DIO8
DIO7
DIO6
DIO5
DIO4
DIO3
DIO2
DIO1
D8
D7
D6
D5
D4
D3
D2
D1
PE
TE
GPIB
CONT*
CE*
ACCGR*
REN
IFC
NDAC
NRFD
DAV
EOI
ATN
SRQ
+5 V
DC TE
REN
IFC
NDAC
NRFD
DAV
EOI
ATN
SRQ
SC
Decode
74573
A3
A2
A1
A2
A1
A0
75162
D7-0
A15-0
CPU(68000)
NAT9914
75160
LDSN
R/WN
ASN
UDSN
IPL2-0
DTACKN
D15-0
A23-0
Decode
A3
A2
A1
Interrupt
Control
Othe r
DTA CK Sources
TE
D7-0
CE*
CONT*
REN
IFC
NDAC
NRFD
DAV
EOI
ATN
SRQ
+5 V
DC TE
REN
IFC
NDAC
NRFD
DAV
EOI
ATN
SRQ
SC
WE*
DIO8
DIO7
DIO6
DIO5
DIO4
DIO3
DIO2
DIO1
D8
D7
D6
D5
D4
D3
D2
D1
PE TE
GPIB
DBIN
+5 V
INT*
RESET
A2
A1
A0
RESET*
68440
RDYN
DTACKN
UDSN
LDSN
R/WN
ASN
A7-A1
UAS
A23/D15 - A8/D0
OWN
74245
DBEN
DDIR
DRQ
ACK
GND
OSC
CLK
ACCRQ*
ACCGR*
75162
74573
74573
A23-0
D15-0
Figure 13.
Typical CPU Systems with NAT9914
BUY ONLINE at ni.com or CALL (800) 813 3693 (U.S.)
9
NI [ NATIONAL INSTRUMENTS CORPORATION ]
