mt9074ap1 Zarlink Semiconductor, mt9074ap1 Datasheet - Page 67
mt9074ap1
Manufacturer Part Number
mt9074ap1
Description
T1/e1/j1 Single Chip Transceiver With Wide Dynamic Range Liu
Manufacturer
Zarlink Semiconductor
Datasheet
1.MT9074AP1.pdf
(151 pages)
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Bit
Bit
7
6
5
4
3
2
1
0
2
1
0
LOS/LOF
CNTCLR
SAMPLE
EXTOSC
Name
PERR
Name
SPND
INTA
RST
RSV
RSV
- - -
Payload Error Insertion. A zero - to - one transition of this bit inserts a
single bit error in the transmit payload. A one, zero or one-to-zero transition
has no function.
Unused.
Loss of Signal or Loss of Frame Selection. If one, pin LOS will go high
when a loss of signal state exists (criteria as per LLOS status bit). If low, pin
LOS will go high when either a loss of signal or a loss of frame alignment
state exits.
Software reset. Setting this bit is equivalent to performing a hardware
reset. All counters are cleared and the control registers are set to their
default values. This control bit is internally cleared after the reset operation
is complete.
Suspend Interrupts. If one, the IRQ output will be in a high-impedance
state and all interrupts will be ignored. If zero, the IRQ output will function
normally.
Interrupt Acknowledge. Setting this bit clears all the interrupt status bits
and forces the IRQ pin into high impedance. The control bit itself is then
internally cleared.
Counter Clear. If one, all status error counters are cleared and held low.
One Second Sample. Setting this bit causes the error counters (change of
frame alignment, loss of frame alignment, bpv errors, crc errors, severely
errored frame events and multiframes out of sync) to be updated on one
second intervals coincident with the one second timer (status page 3
address 12H bit 7).
External Oscillator Select. Setting this bit connects the pin OSC1 to a TTL
compatible input. This allows for a system design employing a TTL output
oscillator as a 20.000 Mhz reference clock.
Reserved. Set to zero for normal operation.
Reserved. Set to zero for normal operation.
Table 30 - Error Insertion Word (T1)
Table 31 - Reset Control Word (T1)
(Page 1, Address 1AH)
(Page 1, Address 19H)
Zarlink Semiconductor Inc.
MT9074
67
Functional Description
Functional Description
Data Sheet
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