L64777 LSI Logic Corporation, L64777 Datasheet - Page 73

• Manufacturer Part Number: L64777
• Description: DVB Qam Modulator
• Manufacturer: LSI Logic Corporation

4.2.2 Register 13
RES
7
BELOW_
THRES
6
MASK_SYNCOK
MASK_FIFO_ALARM
RES
BELOW_THRES
MEASUREMENT_DONE
STEP_UPDATE
AUTO_ACQUI_RUNNING
ACQ_STATE
NCO-Related Registers
MEASUREMENT_
DONE
5
If this bit is 1, a missing SYNCOK does not generate an
interrupt. If this bit is 0, a missing SYNCOK generates an
interrupt. The reset value is 0.
If this bit is 1, a FIFO alarm (pointer collision) does not
generate an interrupt. If this bit is 0, a FIFO alarm
(pointer collision) generates an interrupt. The reset value
is 0.
Reserved
This bit is reserved.
FIFO CONTENT THRESHOLD
When this bit is 1, the virtual FIFO content is below or
equal to the threshold programmed in Register 43.
During AUTO_ACQUISITION, the threshold is
dynamically changed. The reset value is 0.
A 1 in this bit indicates that the measurement data gained
during byte clock probe are valid and that the
measurement is complete. The reset value is 0.
A 1 in this bit indicates a step update since the last
reading of the register. This is relevant only during NCO
acquisition mode. The reset value is 0.
A 1 in this bit indicates that the internal frequency
acquisition is running. The reset value is 0.
Internal Acquisition State
This indicates how many auto acquisition loops have
taken place since the initiation of the auto acquisition
mode. The reference duration has a length of two
ACQ_STATE input packets, and the threshold is divided
by two ACQ_STATE times. The reset value is 0b111.
UPDATE
STEP_
4
AUTO_ACQUI_
RUNNING
3
2
ACQ_STATE
R [2:0]
0
4-11
R 7
R 6
R 5
R 4
R 3
1
0