TDA6502 Datasheet, PDF (32/44 Pages) NXP Semiconductors – 5 V mixers/oscillators and synthesizers for cable TV and VCR 2-band tuners

Philips Semiconductors
5 V mixers/oscillators and synthesizers for
cable TV and VCR 2-band tuners
Preliminary specification
TDA6502; TDA6502A;
TDA6503; TDA6503A
13.6.3 27-BIT SEQUENCE
Conditions:
f_osc = 750 MHz
Port register PUHF is ‘on’
Reference divider is set at 80
I_CP = 60 µA
No test function.
Table 29 27-bit sequence
FREQUENCY DATA BITS
CONTROL DATA BITS
PORT BITS
14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 X CP T2 T1 T0 RSA RSB OS
1000 0 1 1 1 0 1 0 1 0 0 1 1 0 0 0 1 0 0 0 1 0 0 0
To change the oscillator frequency to 600 MHz in 50 kHz steps a 19-bit sequence or an 18-bit sequence can be used.
The charge pump current remains at 60 µA.
Table 30 Changing frequency with a 19-bit sequence
PORT BITS
FREQUENCY DATA BITS
14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1000010111011100000
Table 31 Changing frequency with an 18-bit sequence
PORT BITS
FREQUENCY DATA BITS
13 12 11 10 9 8 7 6 5 4 3 2 1 0
1000 1 0 1 1 1 0 1 1 1 0 0 0 0 0
2000 Mar 16
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