320724-01 查看數據表（PDF） - PANJIT INTERNATIONAL
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320724-01 Datasheet PDF : 16 Pages
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TNT4882
Single-Chip IEEE 488.2 Talker/Listener ASIC
Generic Mode AC Characteristics Waveforms
ABUSN,
BBUSN,
ADDR4-0
t
AS
CSN
RDN
t
CS
t
RW
t
RD
DATA
t
ARDY
RDY1
t
CPU
CPUACC††
†† CPUACC asserts during two-chip mode
NAT4882 accesses only
Figure 7. CPU Read
DRQ
DACKN
RDN
DATA15-0
RDY1
t
DU
t
t
RP
DS
t
DR
t
RDYQ
t
AH
t
CH
t
DF
t
URDY
t
CPU
t
DH
t
DF
t
URDY
ABUSN,
BBUSN,
ADDR4-0
CSN
WRN
DATA
Figure 8. DMA Read
tAS
tCS
tWP
tWS
RDY1
CPUACC††
†† CPUACC asserts during two-chip mode
NAT4882 accesses only
tARDY
tCPU
Figure 9. CPU Write
tAH
tCH
tWH
tURDY
tCPU
Waveforms continued on page 12
National Instruments 11
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