mt9074ap1 Zarlink Semiconductor, mt9074ap1 Datasheet - Page 34

• Manufacturer Part Number: mt9074ap1
• Description: T1/e1/j1 Single Chip Transceiver With Wide Dynamic Range Liu
• Manufacturer: Zarlink Semiconductor

When the device emerges from its reset state it will begin to function with the default settings described in Table
14 (T1) and Table 15 (E1), all control registers default to 00H. A reset operation takes 1 full frame (125 us) to
complete.
Transmit Data All Ones (TxAO) Operation
The TxAO (Transmit all ones) pin allows the PRI interface to transmit an all ones signal from the point of power-up
without writing to any control registers. During this time the IRQ pin is tristated. After the interface has been
initialized normal operation can take place by making TxAO high.
AB/ABCD Bit Debounce
Transmit MFAS (CAS)
ABCD Bit Debounce
Transmit non-FAS
CRC Interworking
Error Insertion
Error Insertion
Transmit Data
Transmit Data
Transmit FAS
RxMF Output
Zero Coding
Line Codes
Loopbacks
Loopbacks
Function
Function
Data Link
Interrupts
Data Link
Signaling
Interrupts
Signaling
HDLC0,1
Counters
Counters
SLC-96
HDLCs
Mode
Mode
Table 14 - Reset Status(T1)
Table 15 - Reset Status(E1)
Zarlink Semiconductor Inc.
MT9074
34
Signaling Multiframe
CAS Registers
CAS Registers
Deactivated
Deactivated
Deactivated
Deactivated
Serial Mode
Deactivated
Deactivated
Deactivated
1/S
Deactivated
Deactivated
Deactivated
Deactivated
Deactivated
Termination
C
00001111
Activated
All Ones
All Ones
masked
Cleared
n
Masked
Cleared
Status
Status
0011011
n
1111111
D4
Data Sheet