HFC-4S Cologne Chip AG, HFC-4S Datasheet - Page 151

• Manufacturer Part Number: HFC-4S
• Description: Isdn HDLC Fifo Controller With 8 (4) Integrated S/t Interfaces
• Manufacturer: Cologne Chip AG

or V_B2_RX_EN in the register A_ST_CTRL2.
5.4 S/T modules and transformers
Customers of Cologne Chip can chose of a variety of S/T transformers for ISDN basic rate interface.
All transformers are compatible to the “HFC-S” series of Cologne Chip that fulfil two criteria:
March 2003 (rev. A)
HFC-4S
HFC-8S
Transmission
FSC0
FSC1
Turns Ratio of 1:2
F0IO
AF0
TE0
TE1
S/T data frame
data transfer from/to
FIFO or PCM interf.
... B1
... B1
S/T data frame
t
A
... B1
... B1
Figure 5.5: Timing example of one transmit and one receive transmission
B2
B2
t
D
D
A
B2
B2
Figure 5.4: Synchronization registers (detail of Figure 5.3)
D
D
B1
B2
D
TX
B1
data_F0IO
TX
B1
B2
data_AF0
S/T interface
B2
Data Sheet
D
D
TX
TX
B1
AF0_FSC1
F0IO_FSC1
B2
B1
D
B2
t
guard_FSC1
D
B1
t
B1
guard_FSC0
B2
B2
D
D
B1
RX
FSC1_F0IO
B2
RX
FSC1_AF0
D
B1
B2
Cologne
Chip
RX
RX
B1
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F0IO_data
AF0_data
D
B2
...
D
...