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參數(shù)資料
| 型號： | IMSC011-W20S |
| 廠商： | 意法半導體 |
| 英文描述： | Link adaptor |
| 中文描述： | 鏈路適配器 |
| 文件頁數(shù)： | 12/30頁 |
| 文件大小： | 239K |
| 代理商： | IMSC011-W20S |
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IMS C011
/ 30
12
5
Mode 1 parallel interface
In Mode 1 the IMS C011link adaptor is configuredas a parallelperipheral interfacewith handshakelines.
Communication with a transputer family device is via the serial link. The parallel interface comprises an
input port and an output port, both with handshake.
5.1
Input port
The eight bitparallel input port
I0-7
canbe readby a transputer familydevice viathe seriallink.
IValid
and
IAck
provide a simple two-wire handshake for this port. When data is valid on
I0-7
,
IValid
is taken high
by the peripheraldevice to commence thehandshake. The link adaptor transmitsdata presented on
I0-7
outthroughtheseriallink.Afterthedata bytetransmissionhasbeen completedandanacknowledgepack-
et is received on the input link, the IMS C011 sets
IAck
high. Tocomplete the handshake,the peripheral
device must return
IValid
low. The link adaptor will then set
IAck
low. New data should not be put onto
I0-7
until
IAck
is returned low.
Symbol
TIdVIvH
TIvHLdV
TLaVIaH
TIaHIdX
TIaHIvL
TIvLIaL
TIaLIvH
Parameter
Data setup
IValid
high to link data output
Link acknowledge start to
IAck
high
Data hold after
IAck
high
IValid
hold after
IAck
high
IAck
hold after
IValid
low
Delay before next
IValid
high
Min
5
0.8
Nom
Max
Units
ns
bits
bits
ns
ns
bits
ns
Notes
2.5
3.5
1,2
1,3
0
0
0.8
0
3
1
Notes
1 Unit of measurementis one linkdata bit time; at 10 Mbits/s data link speed, one bit time isnomi-
nally 100 ns.
2 Maximum timeassumesthere isno acknowledge packetalready on thelink. Maximum timewith
acknowledge on the link is extended by 2 bits.
3 Both data transmission and the returned acknowledge must be completed before
IAck
can go
high.
Table 5.1
Mode 1 parallel data input
Ack
Data
TIdVIvH
TIvLIaL
TIvHLdV
LinkOut
I0–7
LinkIn
TLaVIaH
IValid
IAck
TIaHIvL
TIaLIvH
TIaHIdX
Figure 5.1
IMS C011 Mode 1 parallel data input to link adaptor
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