mt9079apr1 Zarlink Semiconductor, mt9079apr1 Datasheet - Page 37

• Manufacturer Part Number: mt9079apr1
• Description: Advanced Controller For E1
• Manufacturer: Zarlink Semiconductor

7 - 0
7 - 0
Bit
Bit
Bit
7
6
5
4
3
2
1
0
REFRM
Name
TAIS16
CDW7
CDW0
Name
8KSEL
CDWA
(00H)
TAIS0
Name
CIWA
TAIS
CIW7
CIW0
(00H)
(0)
(0)
(0)
TE
(0)
(0)
(0)
(0)
(0)
-
-
Code Detect Word 7 to 0. CDW7 is the most significant bit and CDW0 is the least signifi-
cant bit of a bit pattern that is compared with bit patterns of selected receive time slots.
Time slots are selected for comparison by the CDDTC bit of the per time slot control word.
If a match is found a maskable interrupt (Data) can be initiated.
Code Insert Word 7 to 0. CIW7 is the most significant bit and CIW0 is the least significant
bit of a code word that can be transmitted continuously on any combination of time slots.
The time slots which have data replaced by CIW7 to CIW0 are determined by the CDIN
bit of the per time slot control word.
Transmit Alarm Indication Signal. If one, an all ones signal is transmitted in all time slots
except zero and 16. If zero, these time slots function normally.
Transmit Alarm Indication Signal Zero. If one, an all ones signal is transmitted in time slot
zero. If zero, time slot zero functions normally.
Transmit Alarm Indication Signal 16. If one, an all ones signal is transmitted in time slot 16.
If zero, time slot functions normally.
Transmit E bits. When CRC-4 synchronization is achieved, the E-bits transmit the
received CRC-4 comparison results to the distant end of the link, as per G.704. When zero
and CRC-4 synchronization is lost, the transmit E-bits will be zero (NT application). If one
and CRC-4 synchronization is lost, the transmit E-bits will be one (TE application).
Reframe. If one, for at least one frame, and then cleared the device will initiate a search
for a new basic frame position. This function is activated on the one-to-zero transition of
the REFRM bit.
8 kHz Select. If one, an 8 KHz signal synchronized to the received 2048 kbit/sec. signal is
output on pin E8Ko. If zero, then E8Ko will be high.
Code Insert Word Activate. If one, the bit pattern defined by the Code Insert Word is
inserted in the transmit time slots defined by the per time slot time slot words. If zero, then
this feature is de-activated.
Code Detect Word Activate. A zero-to-one transition will arm the CDWA function. Once
armed the device will search the time slots defined by the per time slot control word for a
match with the bit pattern defined by the code detect word. After a match is found the
CDWA function must be rearmed before further word detections can be made. If zero, this
feature is de-activated.
Table 31 - Transmit Alarm Control Word
Table 33 - Code Detect Word
Table 32 - Code Insert Word
(Page 1, Address 18H)
(Page 1, Address 17H)
(Page 1, Address 16H)
Zarlink Semiconductor Inc.
MT9079
37
Functional Description
Functional Description
Functional Description
Data Sheet