pt7a6527 Pericom Technology Inc, pt7a6527 Datasheet - Page 4

• Manufacturer Part Number: pt7a6527
• Description: Hdlc Controller
• Manufacturer: Pericom Technology Inc

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Typical Applications
Communication Multiplexers
The four independent serial HDLC communication channels
implemented in the PT7A6527 make the circuit suitable for
use in communication multiplexers.
The collision detection/resolution capability of the circuit
allows statistical multiplexing of packets in one or several
physical data communication channels, for example in DMI
(mode 3) applications.
Centralized Signaling / Data Packet Handlers
The PT7A6527 can be used in central packet handlers of
ISDN networks to process signaling or packet data of four
ISDN subscribers. In this application, it may be used with or
without PCM Interface Controller (PCM Controller).
Figure 1 Use of PT7A6527 in Central Signaling / Data Packet Handlers
PT0080(02/09)
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The PT7A6527 can be connected to the IOM interface of the
PCM CONTROLLER, which is itself connected to the PCM
system highway. The PCM CONTROLLER implements
concentration and time slot assignment functions. As an
alternative, the PT7A6527 may be directly connected to PCM
highways (figure 1).
The size (from 1 to 8 bits) and the position of the time slot
associated
programmable. In addition to the receiver and transmit data
highways, the PT7A6527 accepts a third input connection for
collision detection purposes. The mode of collision detection
is programmable. A collision highway (or time slot) can be
used for remote collision control, as a clear to send lead, or for
local contention resolution among several devices.
with
each
HDLC
HDLC controller
controller
Data Sheet
PT7A6527
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