TDA6402 datasheet(8/40 Pages) PHILIPS

8 / 40 page

2000 Jan 24

Philips Semiconductors

Product speciﬁcation

5 V mixers/oscillators and synthesizers for

cable TV and VCR 2-band tuners

TDA6402; TDA6402A;

TDA6403; TDA6403A

I2C-bus mode (SW = GND)

WRITE MODE; R/W = 0 (see Tables 3 and 4)

Data bytes can be sent to the device after the address

transmission (first byte). Four data bytes are needed to

fully program the device. The bus transceiver has an

auto-increment facility which permits the programming of

the device within one single transmission

(address + 4 data bytes).

The device can also be partially programmed providing

that the first data byte following the address is divider

byte 1 (DB1) or control byte (CB). The bits in the data

bytes are defined in Tables 3 and 4. The first bit of the first

data byte transmitted indicates whether frequency data

(first bit = 0) or control and band-switch data (first bit = 1)

will follow. Until an I2C-bus STOP command is sent by the

controller, additional data bytes can be entered without the

need to re-address the device. The frequency register is

loaded after the 8th clock pulse of the second divider byte

(DB2), the control register is loaded after the 8th clock

pulse of the control byte (CB) and the band-switch register

is loaded after the 8th clock pulse of the band switch byte

(BB).

I2C-BUS ADDRESS SELECTION

The module address contains programmable address bits

(MA1 and MA0) which offer the possibility of having

several synthesizers (up to 4) in one system by applying a

specific voltage on the CE input. The relationship between

MA1 and MA0 and the input voltage applied to the CE

input is given in Table 6.

Table 3

I2C-bus data format, ‘write’ mode for the TDA6402 and TDA6403

Table 4

I2C-bus data format, ‘write’ mode for the TDA6402A and TDA6403A

NAME

BYTE

BITS

ACK

MSB

LSB

Address byte

ADB

11000

MA1

MA0

R/W = 0

Divider byte 1

DB1

N14

N13

N12

N11

N10

Divider byte 2

DB2

Control byte

RSA

RSB

Band-switch byte

XXXX

FMST

PUHF

PVHFH

PVHFL