L64704 LSI Logic Corporation, L64704 Datasheet - Page 55

• Manufacturer Part Number: L64704
• Description: Satellite Decoder Technical Manual 5/97
• Manufacturer: LSI Logic Corporation

3.5.5
Group 3,
APR 6, 7
Measured VCO
Frequency
3.5.6
Group 3,
APR 8
AGC Loop
Voltage Meter
3.5.7
Group 3,
APR 9
Carrier and FEC
Synchronization
Status
The L64704 puts the result of the VCO frequency measurement into this
16-bit register. Both the upper and lower nibbles must be read before the
L64704 releases this register for a new value. See
“Carrier VCO Frequency Measurement,”
computes this value.
Read/Write: R
The L64704 stores the AGC loop control voltage in this register. See
Section 5.7.3, “Power Level,”
PWR_LVL.
Read/Write: R
This register contains the Carrier Loop and FEC pipeline synchronization
status bits.
Read/Write: R
Reserved
Group 3 Registers
APR
APR
APR
APR
6
7
8
9
Demod
_SNR
D7
D7
D7
D7
Reserved
XCTR_IN
Reserved Bits
These bits are reserved for LSI Logic internal use only.
When read, they will return an indeterminate value.
D6
D6
D6
D6
CAR_
LCF
D5
D5
D5
D5
for an equation that relates V
CAR_LC CLK_LCF
CAR_VCOF[7:0]
PWR_LVL[7:0]
D4
D4
D4
D4
CAR_VCOF[13:8]
for details on how the L64704
D3
D3
D3
D3
D2
D2
D2
D2
S3
Reset Value: 0x0000
Section 5.6.1.2,
Reset Value: 0x00
Reset Value: 0x00
D1
D1
D1
D1
S2
AGC
and
D0
D0
D0
D0
S1
[7:6]
3-23