參數(shù)資料
型號: SAA7708H
廠商: NXP Semiconductors N.V.
元件分類: 數(shù)字信號處理
英文描述: Car Radio Digital Signal Processor
中文描述: 汽車無線電數(shù)字信號處理器
文件頁數(shù): 19/60頁
文件大?。?/td> 281K
代理商: SAA7708H
1998 May 19
19
Philips Semiconductors
Preliminary specification
Car Radio Digital Signal Processor
SAA7708H
Table 2
Volume settings of the PHONE input ($0FFE)
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 I
2
Cbits ($0FFD) signal destination
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.
VOL_PHONE BITS
P4,P3,P2,P1,P0
FL AND FR OUTPUT (DB)
00000
00001
00010
00011
00110
01110
01111
01111
1111*
0
-3
-6
-9
-12
-15
-18
-21
MUTE
MODE
pcs_ad
_sel
en_38
_clk
sw_
ad1
rds_cd
_sel
s1_2
s4_5
s6_7
s8_9
wide_
narrow
FM_MPX +
RDS mode
200 mV
FM_MPX +
RDS mode
0
0
0
0
d
d
d
0
0
65 mV
AM mono +
RDS
AM stereo +
RDS
TAPE
STEREO +
RDS
CD-ANALOG
+ RDS
CD ANALOG
PHONE via
SCAD1 +
RDS
1
0
0
0
d
d
d
0
0
0 or 1
0
0
0
0
1
d
1
0
0 or 1
1
d
0
0
1
0
1
0
0 or 1
1
d
0
1
0
0
1
0
0 or 1
1
d
0
0
0
0
1
0
d
0
0
1
1
1
0
0
d
0
d
0
1
d
d
1
0
0 or 1
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