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UAA2062

Analog cordless telephone IC

Philips Electronics 

Philips Semiconductors

Analog cordless telephone IC

Product specification

UAA2062

FM PLL CENTRE FREQUENCY SHIFT SELECTION

This programming enables to shift the centre frequency of the VCO, within the FM PLL, in order to align the frequency

as close as possible to the 2nd IF frequency (nominal frequency 455 kHz).

Table 16 FM PLL centre frequency shift selection

BIT 3

0

0

0

0

0

0

0

0

1

1

1

1

1

1

1

1

BIT 2

0

0

0

0

1

1

1

1

0

0

0

0

1

1

1

1

BIT 1

0

0

1

1

0

0

1

1

0

0

1

1

0

0

1

1

BIT 0

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

STEP

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

CENTRE

FREQUENCY

SHIFT (kHz)

−154

−132

−110

−88

−66

−44

−22

0

+22

+44

+66

+88

+110

+132

+154

+176

CLOCK DIVIDER RATIO SELECTION

The clock output signal CLKO is derived from the local oscillator LO2 and can be used to drive a microcontroller. The

LO2 signal is divided with a programmable divider value. The divider is followed by a filter that controls the slew rate of

the signal in order to avoid radiation noise on the PCB. The CLKO output also has the option to disable the output signal.

The default value is step 1 (01).

Table 17 Clock divider ratio selection

BIT 1

0

0

1

BIT 0

0

1

0

STEP

0

1

2

CLOCK DIVIDER RATIO

output disabled

2.5

80

2000 Aug 10

21

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