IMSC011 データシートの表示（PDF） - STMicroelectronics
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IMSC011 Datasheet PDF : 30 Pages
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IMS C011
5 Mode 1 parallel interface
In Mode 1 the IMS C011 link adaptor is configured as a parallel peripheral interface with handshake lines.
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 bit parallel input port I0-7 can be read by a transputer family device via the serial link. 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 peripheral device to commence the handshake. The link adaptor transmits data presented on I0-7
out through the serial link. After the data byte transmission has been completed and an acknowledge pack-
et is received on the input link, the IMS C011 sets IAck high. To complete 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 Nom Max Units Notes
5
ns
0.8
2.5
bits
1,2
3.5
bits
1,3
0
ns
0
ns
0.8
3
bits
1
0
ns
Notes
1 Unit of measurement is one link data bit time; at 10 Mbits/s data link speed, one bit time is nomi-
nally 100 ns.
2 Maximum time assumes there is no acknowledge packet already on the link. Maximum time with
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
I0–7
IValid
IAck
LinkOut
LinkIn
TIdVIvH
TIaHIdX
TIaHIvL TIvLIaL TIaLIvH
TIvHLdV
Data
TLaVIaH
Ack
Figure 5.1 IMS C011 Mode 1 parallel data input to link adaptor
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