HFC-S2M Cologne Chip AG, HFC-S2M Datasheet - Page 99
HFC-S2M
Manufacturer Part Number
HFC-S2M
Description
Isdn HDLC Fifo Controller With Primary Rate Interface
Manufacturer
Cologne Chip AG
Datasheet
1.HFC-S2M.pdf
(272 pages)
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Connection summary
Table 3.2 shows the flow controller connections as a whole. Bidirectional connections
pointed out with a gray box because they are typically used to establish the data transmis-
sions. These rows have always an additional connection to a second destination.
The most important connections are data transmissions to a single destination. For these
connections it is possible to manage the configuration programming of V_DATA_FLOW
with only four different values for transmit and receive FIFO operations. Table 3.3 shows
the suitable programming values which can be used to simplify the programming algorithm.
receive data which belong together. Instead of “transmit and corresponding receive data connection” the shorter expression
“bidirectional connection” is used in this data sheet.
March 2003 (rev. A)
HFC-E1
3
In fact, all connections are unidirectional. However, in typical applications there is always a pair of transmit and
V_DATA_FLOW
000
001
010
011
100
101
110
111
Table 3.3: V _ DATA _ FLOW programming values for single-destination connections
Connection
FIFO
FIFO
FIFO
FIFO
E1
E1
FIFO
FIFO
FIFO
FIFO
FIFO
FIFO
E1
E1
PCM
PCM
E1
E1
PCM
PCM
Table 3.2: Flow controller connectivity
PCM
PCM
E1
PCM
E1
V_DATA_FLOW
E1
PCM
E1
Required
’10x’
’x00’
’01x’
’x01’
’11x’
’x10’
Transmit
Data Sheet
Data flow
FIFO
E1
E1
FIFO
PCM
PCM
PCM
PCM
V_DATA_FLOW
Equalized
’100’
’011’
’001’
’110’
FIFO
FIFO
FIFO
FIFO
FIFO
FIFO
FIFO
FIFO
Receive FIFO
E1
PCM
E1
PCM
E1
PCM
PCM
E1
Data
direction
transmit
receive
transmit
receive
transmit
receive
E1
E1
E1
E1
Cologne
Chip
PCM
PCM
PCM
PCM
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