mt9072av2 Zarlink Semiconductor, mt9072av2 Datasheet - Page 72
mt9072av2
Manufacturer Part Number
mt9072av2
Description
Octal T1/e1/j1 Framer
Manufacturer
Zarlink Semiconductor
Datasheet
1.MT9072AV2.pdf
(275 pages)
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9.0
The MT9072 has 1 embedded HDLC controller for each of the framers. Each controller may be attached to any
timeslot. The HDLC can also be connected to the FDL bits (T1 ESF Mode) for provision of a 4 Kbit/s Data Link or
Sa bits in E1 mode for data link up to 20 Kb/s.
The features of the HDLC are:
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•
•
•
•
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The relevant registers associated with HDLC are listed in Table 32.
Register
Address
Independent transmit and receive FIFO;
Receive FIFO maskable interrupts for nearly full and overflow conditions;
Transmit FIFO maskable interrupts for nearly empty and underflow conditions;
Maskable interrupts for transmit end-of-packet and receive end-of-packet;
Maskable interrupts for receive bad-frame (includes frame abort);
Transmit end-of-packet and frame-abort functions.
Y1D
Y1E
Y06
YF2
YF3
YF4
YF5
YF6
Y1F
Y23
Y33
Y43
HDLC
HDLC and DataLink Control
HDLC Control
HDLC Test Control
Address Recognition
Transmit FIFO
Transmit Byte Counter
HDLC Status
Receive CRC
Receive FIFO
HDLC Latch Status
HDLC Interrupt Status
HDLC Interrupt Mask
Register
Table 32 - HDLC Related Registers
to the Data Link or payload.
General configuration for the HDLC.
Control bits for testing the HDLC such as loopbacks.
a packet that matches the received address.
The data from the FIFO can be subsequently sent to Data Link or a
selected channel.
This counter determines the size of the HDLC packet to be sent
when the cycle bit is set (YF2).
This register provides status on the FIFO’s.
This register provides the received FCS of a packet.
This register has to be read to obtain the receive FIFO data.
These register bits are the latched version of the HDLC status.
underflow, go ahead packet etc.
interrupts.
Zarlink Semiconductor Inc.
The bits of this register determine whether the HDLC is connected
Address recognition register for storing data in the Receive FIFO of
This register is used for writing data to the HDLC Transmit FIFO.
This register provides the interrupt status of events such as
These register bits can be used to mask HDLC events to cause
MT9072
72
Description
Data Sheet
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