Philips Semiconductors
Product specification
New In Car Entertainment (NICE) car radio
TEA6845AH; TEA6845H
12.2.6 WRITE MODE: DATA BYTE 5
Table 15 Format of data byte 5
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
KAGC
WBA1
WBA0
AMSM
TMS3
TMS2
TMS1
TMS0
Table 16 Description of data byte 5 bits
BIT
SYMBOL
DESCRIPTION
7
KAGC
Keyed FM AGC. If KAGC = 0, then keyed FM AGC is off. If KAGC = 1, then keyed
FM AGC is on.
6 and 5
WBA[1:0]
AMSM
Wide band AGC. These 2 bits set the start value of wide band AGC. For AM,
see Table 17 and for FM, see Table 18.
4
AM soft mute. If AMSM = 0, then AM soft mute is off. If AMSM = 1, then AM soft mute
is on.
3
2
TMS3
In test mode charge pump 3-state. If TMS3 = 0, then 3-state off. If TMS3 = 1, then
3-state on.
TMS2
In test mode external clock for level and antenna DAA. If TMS2 = 0, then external
clock disabled. If TMS2 = 1, then external clock enabled.
1 and 0
TMS[1:0]
In test mode setting of pin fref. These 2 bits define the function of pin fref,
see Table 19.
Table 17 Setting of wide band AGC for AM
AM MIXER 1 INPUT VOLTAGE (PEAK VALUE)
(mV)
WBA1
WBA0
0
0
1
1
0
1
0
1
150
275
400
525
Table 18 Setting of wide band AGC for FM
FM RF MIXER 1 INPUT VOLTAGE (RMS VALUE)
(mV)
WBA1
WBA0
1
1
0
0
1
0
1
0
4
8
12
16
Table 19 Setting function of pin fref in test mode
TMS1
TMS0
OUTPUT AT PIN fref
0
0
0
1
reference frequency of TEA6880H or TEF6890H
tuner oscillator frequency divided by division ratio of
programmable divider
1
1
0
1
PLL synthesizer reference frequency
not used (no output)
2001 Apr 12
32
NXP [ NXP ]
