TEA5759HL Ver la hoja de datos (PDF) - Philips Electronics
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TEA5759HL Datasheet PDF : 40 Pages
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Philips Semiconductors
Self Tuned Radio (STR)
Product specification
TEA5757HL; TEA5759HL
Description of the bus
The TEA5757HL; TEA5759HL radio has a bus which
consists of three wires, as shown in Table 2.
Table 2 Bus signals
SIGNAL
DESCRIPTION
PIN
BUS-CLOCK
software driven clock input 29
DATA
data input/output
30
WRITE-ENABLE write/read input
31
These three signals, together with the mono/stereo pin
(MO/ST; pin 26), communicate with the microcontroller.
The mono/stereo indicator has two functions, which are
controlled by the BUS-CLOCK, as shown in Table 3.
Table 3 Bus-clock functions
BUS-CLOCK
LOW
LOW
HIGH
HIGH
MO/ST (PIN 26)
LOW
HIGH
LOW
HIGH
RESULT
stereo
mono
tuned
not tuned
The TEA5757HL; TEA5759HL has a 25-bit shift register;
see Table 4 for an explanation of the shift register bits.
If in search mode no transmitter can be found, all
frequency bits of the shift register are set to logic 0.
The bus protocol is illustrated in Figs 4 and 5.
Table 4 Explanation of the shift register bits
BIT
S.24 (MSB)
DESCRIPTION
search start/end
D.23
search up/down
M.22
mono/stereo
B0.21
B1.20
P0.19
band
band
port
P1.18
port
S0.17
search-level of station
S1.16
search-level of station
15
dummy
F.14 to F.0 (LSB) frequency
LOGIC
STATE
RESULT
0
after a search when a station is found or after a preset
1
during the search action
0
indicates if the radio has to search down
1
indicates if the radio has to search up
0
stereo is allowed
1
mono is required (radio switched to forced mono)
see Table 5 selects FM/MW/LW/SW band
see Table 5 selects FM/MW/LW/SW band
note 1
user programmable bits which e.g. can be used as
band switch driver
note 1
user programmable bits which e.g. can be used as
band switch driver
see Table 6 determines the locking field strength during an
automatic search, automatic store or manual search
see Table 6
−
−
determines the locking field strength during an
automatic search, automatic store or manual search
buffer
determine the tuning frequency of the radio;
see Table 7 for the bit values
Note
1. The output pins 32 and 33 can drive currents up to 5 mA; bits P0.19 and P1.18 control the output voltage of the
control pins P0 (pin 32) and P1 (pin 33):
a) Bit P0.19 LOW sets P0 (pin 32) to LOW.
b) Bit P0.19 HIGH sets P0 (pin 32) to HIGH.
c) Bit P1.18 LOW sets P1 (pin 33) to LOW.
d) Bit P1.18 HIGH sets P1 (pin 33) to HIGH.
2000 Feb 02
9
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