TDA8263HN Datasheet, PDF (13/28 Pages) NXP Semiconductors – Fully integrated satellite tuner

Philips Semiconductors
TDA8263HN
Fully integrated satellite tuner
Table 19: Second loop charge pump test; bits CP2TST and FPFD2
These bits force the inputs of the second loop charge pump. This test could be used to force the LO
VCO at its maximum or minimum tuning voltage.
CP2TST
FPFD2 Actions
0
X
test disable
1
0
sink on and source off; LO VCO maximum frequency measurement
1
1
sink off and source on; LO VCO minimum frequency measurement
Table 20: Select main loop charge-pump current; bit CPHIGH
CPHIGH
Action
0
first charge pump active (low currents)
1
second charge pump active (high currents)
Table 21: Amplitude of the internal VCO; bits AMPVCO[2:0]
These bits control the amplitude of the internal LC VCO.
AMPVCO[2:0]
Value
Binary value
The allowed value is AMPVCO[2:0] = 100 (decimal 4). The product is
specified only with this value, other settings may lead to different
performance.
Table 22: Control port output; bits PORT[1:0]
Bit PORT1 controls the use of PORT1 and bit PORT0 controls the use of PORT0. Outputs PORTn
are realized with open-drain NMOS transistors.
PORTn
Action
0
PORTn at high-impedance
1
PORTn in sink mode; minimum 9 mA drive capability
Table 23: Calibration wait time control; bit CALTIME
This bit controls the duration of the wait time of the calibration. This time is used to wait PLL locking
after programming a Dword. The reference clock of the time is the comparison frequency of the PLL
CALTIME
f_c divider ratio
Wait time for f_comp = 1 MHz (ms)
0
28 673
28.673
1
32 769
32.769
Table 24: Maximum voltage tuning threshold for calibration control; bits SELVTH[1:0]
These bits control the voltage threshold for the ACUP comparator. The ACUP and ACDN
comparators sense the LC VCO tuning voltage at pin VT.
SELVTH1 SELVTH0 Decimal Threshold VTH (V) ^{[1] [2]}
0
0
0
1.8
0
1
1
1.9
1
0
2
2.0
1
1
3
2.1
[1] Typical values at nominal process and room temperature.
[2] The recommended value is SELVTH[1:0] = 11 (decimal 3).
9397 750 13193
Product data sheet
Rev. 01 — 14 December 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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