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TDA7511

Write Operation

Following a START condition the master sends a slave address word with the R/W bit set to "0". The TDA 7511

will generate an "acknowledge" after this first transmission and will wait for a second word (the word address

field). This 8-bit address field provides an access to any of the 32 internal addresses. Upon receipt of the word

address the TDA 7511 slave device will respond with an "acknowledge". At this time, all the following words

transmitted to the TDA 7511 will be considered as Data. The internal address will be automatically incremented.

After each word receipt the TDA 7511 will answer with an "acknowledge".

Read Operation

IF the master sends a slave address word with the R/W bit set to "1", the TDA 7511 will transit one 8-bit data

word. This data word includes the following informations:

bit0 (ISS filter, 1 = ON, 0 = OFF)

bit1 (ISS filter bandwidth, 1 = 80kHz, 0 = 120kHz)

bit2 (MPOUT,1 = multipath present, 0 = no multipath)

bit3 (1 = PLL is locked in , 0 = PLL is locked out).

bit4 (fieldstrength indicator, 1 = lower as softmute threshold, 0 = higher as softmute threshold)

bit5 (adjacent channel indicator, 1 = adjacent channel present, 0 = no adjacent channel)

bit6 (deviation indicator, 1 = strong overdeviation present, 0 = no strong overdeviation)

bit7 (deviation indicator, 1 = overdeviation present, 0 = no overdeviation)

2

Software Specification

The interface protocol comprises:

- start condition (S)

- chip address byte

- subaddress byte

- sequence of data (N bytes + Acknowledge)

- stop condition (P)

Figure 1.

99AT0054

S

1

1

0

0

0

1

0

X

MSB

LSB

CHIP ADDRESS

ACK

S

P

I

X

Acknowledge

Start

Stop

Pagemode

R/W Bit

=

=

=

=

=

ACK

T

T

I

A4 A3 A2 A1 A0

MSB

LSB

SUBADDRESS

ACK

DATA

MSB

LSB

DATA1 - DATAn

ACK

P