HFC-S2M Cologne Chip AG, HFC-S2M Datasheet - Page 101

• Manufacturer Part Number: HFC-S2M
• Description: Isdn HDLC Fifo Controller With Primary Rate Interface
• Manufacturer: Cologne Chip AG

If S/T-channels are coded as
it is possible to calculate
For a given HFC-channel number the belonging S/T-channel is calculated with
In both cases the equivalence
is valid.
3.4 Data flow modes
The internal operation of the channel assigner and the subchannel processor depends on the
selected data flow mode. The three available modes
are described in this section.
3.4.1 Simple Mode
In Simple Mode (SM) only one-to-one connections are possible. That means one FIFO, one
E1 time slot or one PCM time slot can be connected to each other. All combinations except
the FIFO-to-FIFO connection are possible. The number of connections is limited by the
number of FIFOs. It is possible to establish as many connections as there are FIFOs
actual number of FIFOs depends on the FIFO setup (see Section 4.2).
Simple Mode is selected with V_CSM_MD
than the maximum FIFO number.
March 2003 (rev. A)
HFC-E1
6
7
div is the integer division. mod is the division remainder mod
Except PCM-to-PCM connections which do not need a FIFO resource if the involved HFC-channel number is higher
Simple Mode (SM)
Channel Select Mode (CSM)
FIFO Sequence Mode (FSM)
HFC-channel number
S/T-channel code
interface number
HFC-channel direction
B1-channel
B2-channel
D-channel
interface number ¡
E-channel
Data Sheet
Data flow
HFC-channel number div
HFC-channel number mod
V_FSM_MD
S/T-channel direction
¼
½
¾
¿
´
·
S/T-channel code
¼
div
in the register R_FIFO_MD.
µ £
.
6
Cologne
Chip
101 of 272
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. The