dp8344b National Semiconductor Corporation, dp8344b Datasheet - Page 90
dp8344b
Manufacturer Part Number
dp8344b
Description
Biphase Communications Processor?bcp
Manufacturer
National Semiconductor Corporation
Datasheet
1.DP8344B.pdf
(184 pages)
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4 0 Remote Interface and Arbitration System (RIAS)
BCP sampling a valid remote write The second set of arrows (1 T-state later) shows the BCP sampling the end of
BCP sampling a valid remote write The second set of arrows (1 T-state later) shows the BCP sampling the end of
1 5 T-states later) the value of CMD will not be sampled The value of CMD does not change from the first remote
the first remote access If a second remote access starts before the position of the third set of arrows (another
the first remote access If a second remote access starts before the position of the third set of arrows (another
(a) This timing diagram shows the second remote access violating rest time The first set of arrows shows the
(b) This timing diagram shows the second remote access violating rest time The first set of arrows shows the
1 5 T-states later) the value of CMD will not be sampled The value of CMD has changed from the first remote
(c) This timing diagram shows the timing needed to avoid violating rest time for all modes except
latched write The first set of arrows shows the BCP sampling the end of the first remote access
started and the value of CMD will be sampled for the next remote access The third set of arrows
The second set of arrows (1 5 T-states later) shows the BCP recognizing no remote access has
access so the BCP will write to the intended location during the second remote access
shows the BCP sampling the correct value of CMD for the second remote access
access so the BCP will write to the wrong location during the second access
FIGURE 4-25 Remote Rest Time for All Modes except Latched Write
90
(Continued)
TL F 9336 – G7
TL F 9336 – G8
TL F 9336 – G9
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