TDA6509 datasheet(8/42 Pages) PHILIPS

8 / 42 page

2005 Mar 25

Philips Semiconductors

Product speciﬁcation

3-band mixer/oscillator and PLL for

terrestrial tuners

TDA6508; TDA6508A;

TDA6509; TDA6509A

handbook, halfpage

TDA6509

TDA6509A

VCC

HIGH_OSCIN2

HIGH_OSCIN1

MID_OSCIN1

MID_OSCIN2

OSC_GND

LOW_OSCOUT

LOW_OSCIN

MDB225

SDA

SCL

IFAMP_IN2

IFAMP_IN1

Fig.4 Pin configuration for TDA6509 and TDA6509A (HVQFN32).

8I2C-BUS DATA FORMAT

8.1

I2C-bus address selection

The address byte ADB contains programmable module

address bits MA1 and MA0 which allow up to four

synthesizers to be used in the same system, and are

configured by applying one of four possible voltages on

pin AS; see Tables 1 and 2. For each voltage on pin AS,

the resultant values of bits MA1 and MA0 are shown in

Table 3.

8.2

Write mode

The write mode is defined by setting bit R/W to logic 0 in

address byte ADB; see Table 1.

Data bytes can be sent to the device after sending the first

address byte. Four data bytes are required to fully program

the device.

The bus transceiver has an auto-increment facility which

allows the device to be programmed by one transmission

(address byte with 4 data bytes). The device can be

partially programmed provided that the first data byte

following the address byte is divider byte DB1 or control

byte CB.

The MSB of the first data byte DB1 indicates whether

frequency data (MSB = 0) or control and band switch data

will follow. Additional data bytes can be entered without the

need to re-address the device until an I2C-bus STOP

command is sent by the controller.

The frequency divider register is loaded after the 8th clock

pulse of byte DB2. The control register is loaded after the

8th clock pulse of byte CB, and the band switch register is

loaded after the 8th clock pulse of byte BB.

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