TSA5518M View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

TSA5518M

1.3 GHz bidirectional I2C-bus controlled synthesizer

Philips Electronics 

Philips Semiconductors

1.3 GHz bidirectional I2C-bus controlled

synthesizer

Product specification

TSA5518M

PINNING

SYMBOL PIN

DESCRIPTION

UD

1 drive output (UD)

P7

2 P7 output port

P5

3 P5 output port

P4

4 P4 output port

BS

5 bandswitch output for M/O drive

n.c

6 not connected

RF2

7 UHF/VHF signal input 2

RF1

8 UHF/VHF signal input 1

GND

9 ground

P1

10 P1 output port (general purpose)

P0

11 P0 output port (general purpose)

AS

12 input for Address Selection

P6

13 P6 port (output/input for general

purpose ADC)

P2

SDA

SCL

14 P2 output port (fDIV if the test mode

is active)

15 I2C-bus serial data input/output

16 I2C-bus serial clock

VCC

17 voltage supply

n.c

18 not connected

XTAL

19 crystal oscillator input

PD

20 charge-pump output (PD)

handbook, halfpage

UD 1

20 PD

P7 2

19 XTAL

P5 3

18 n.c.

P4 4

17 VCC

BS 5

16 SCL

TSA5518M

n.c. 6

15 SDA

RF2 7

14 P2

RF1 8

GND 9

P1 10

13 P6

12 AS

11 P0

MBH947

Fig.2 Pin configuration.

FUNCTIONAL DESCRIPTION

The device is controlled via the two wire I2C-bus.

For programming, there is one module address (7 bits)

and the R/W bit for selecting READ or WRITE mode.

Write mode

The write data format is summarized in Table 1. After the

address transmission (first byte), data bytes can be sent to

the device. 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 byte + 4 data bytes).

The device can also be partially programmed on the

condition that the first data byte following the address is

byte 2 or 4. The meaning of the bits in the data bytes is

given in Table 3. The first bit of the first data byte

transmitted indicates whether frequency data (first bit = 0)

or charge pump and port information (first bit = 1) will

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

controller, additional data bytes can be entered without the

need to re-address the device. This allows a smooth

frequency sweep for fine tuning or AFC purpose. At

power-on the ports are set to the high-impedance state

(open-collector outputs) or at the HIGH level (emitter

follower outputs). The bandswitch output BS provides a

voltage output suitable for the band selection input of

mixer/oscillator ICs TDA5330, TDA5630A and TDA5730.

It is controlled by B1 and B0 bits or P7, P5 and P4 bits

depending on the BSC bit (see Tables 1 to 4). The

7.8125 kHz reference frequency is obtained by dividing

the output of the 4 MHz crystal oscillator by 512. Because

the input of UHF/VHF signal is first divided-by-8 the step

size is 62.5 kHz. A 3.2 MHz crystal can offer step size of

50 kHz.

1997 Mar 07

4

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