mt8920bs1 Zarlink Semiconductor, mt8920bs1 Datasheet - Page 19
mt8920bs1
Manufacturer Part Number
mt8920bs1
Description
32 Channels Tdm St-bus To Parallel Bus Access Circuit
Manufacturer
Zarlink Semiconductor
Datasheet
1.MT8920BS1.pdf
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Data Sheet
CONDITION 1:
CONDITION 2:
CONDITION 3:
CONDITION 4:
OE, R/W
OE, R/W
OE, R/W
OE, R/W
A0 - A5
BUSY
BUSY
BUSY
BUSY
C4i
CS
Access begins before contention window and finishes before ST-BUS access - No contention.
Access begins before contention window and continues into ST-BUS access.
Access begins during ST-BUS access
Access begins within contention window but before ST-BUS access.
READ ADDRESS N or WRITE ADDRESS (N + 1)
CHANNEL N - BIT 0
t
Figure 16 - Mode 2 Access Contention Resolution
EC4L
t
EC4L
CONTENTION WINDOW
t
EBL
t
t
EC4H
C4BL
ST-BUS ACCESS
t
EBL
t
C4BH
(N matches incoming
ST-BUS channel)
CHANNEL (N + 1) - BIT 7
MT8920B
t
t
C4BH
C4BH
19
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