SAA7708H Просмотр технического описания (PDF) - Philips Electronics

Номер в каталоге

Компоненты Описание

производитель

SAA7708H

Car Radio Digital Signal Processor

Philips Electronics 

Philips Semiconductors

Car Radio Digital Signal Processor

Preliminary specification

SAA7708H

Table 2 Volume settings of the PHONE input ($0FFE)

VOL_PHONE BITS

P4,P3,P2,P1,P0

00000

00001

00010

00011

00110

01110

01111

01111

1111*

0

-3

-6

-9

-12

-15

-18

-21

MUTE

FL AND FR OUTPUT (DB)

10.3 Input selection switches

In Fig. 4 a block diagram of the input is shown. The input selection is controlled by bits in the input selector control register

and the input pin SEL_FR. The relation between these bits and the switches is indicated in table 3. This table is not 100%

elaborated but gives an idea of the switching possibilities.

Table 3 Analog input selection via I2Cbits ($0FFD) signal destination

MODE

FM_MPX +

RDS mode

pcs_ad en_38

_sel _clk

0

0

sw_

ad1

rds_cd

_sel

s1_2

0

0

d

s4_5

d

s6_7

d

s8_9

0

wide_

narrow

0

200 mV

FM_MPX +

1

0

0

0

d

d

d

0

0

RDS mode

65 mV

AM mono +

0 or 1

0

0

0

0

1

d

1

0

RDS

AM stereo + 0 or 1

1

d

0

0

1

0

1

0

RDS

TAPE

0 or 1

1

d

0

1

0

0

1

0

STEREO +

RDS

CD-ANALOG 0 or 1

1

d

0

0

0

0

1

0

+ RDS

CD ANALOG

d

0

1

1

0

0

0

d

1

PHONE via

0 or 1

0

1

0

d

d

1

d

0

SCAD1 +

RDS

• In all the positions above one supposes that the SEL_FR pin is low.

The switches s10 and s11 must be switched according the position needed for the correct common mode rejection

ratio of the chosen input e.g. s10=0 and s11=1 in case of CD analog input.

1998 May 19

19

Share Link: