TEA5760UK/N1-T ST-Ericsson Inc, TEA5760UK/N1-T Datasheet - Page 10

• Manufacturer Part Number: TEA5760UK/N1-T
• Description: IC FM STEREO RADIO 25-WLCSP
• Manufacturer: ST-Ericsson Inc

Specifications of TEA5760UK/N1-T

• Frequency: 76MHz ~ 90MHz, 87.5MHz ~ 108MHz
• Modulation Or Protocol: FM
• Current - Receiving: 10mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Voltage - Supply: 2.6 V ~ 3.6 V
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 25-WLCSP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Applications: -
• Sensitivity: -
• Memory Size: -
• Data Rate - Maximum: -
• Other names: 935278949118

NXP Semiconductors
TEA5760UK_1
Product data sheet
6.19.1 Search mode
6.17 Power-on reset
6.18 Control interface
6.19 Auto search and preset mode
After start-up of V
the registers will be set to their default values as shown in
effectively generated by V
before power is switched on, pin BUSEN must be LOW. The audio output pins are
high-ohmic (hard mute), all other bits are set default according to
The I
In Search mode the TEA5760UK can search channels automatically.
When the INTX signal is used as an interrupt to the host processor to indicate a search
stop, the INTMSK register must be reset and only the FRRMSK must be set. In this way
the host processor will only be interrupted when the search/preset algorithm is ready.
Search mode is initiated by setting the SM bit to logic 1 in the FRQSET register. When bit
SUD = 0 then it searches down, when SUD = 1 it searches up. The tuner starts searching
at the frequency where it is or at a new start frequency programmed to the tuner. In the
case the programmed frequency is a valid channel and auto search is initiated, the radio
will stay tuned to programmed frequency. To continue the auto search tune algorithm
under such conditions, an offset frequency relative to the tuned frequency has to be
programmed (for example 100 kHz) to search for subsequent channels. With the Search
Stop Level (SSL) bits the minimum field strength of channels to be found can be set. The
tuner will stop on a channel with a field strength equal to or higher than this reference level
and then will check the IF frequency. When both are valid the Search mode terminates. If
the level check or the IF count fails, it keeps on searching. When no channels are found
the TEA5760UK stops searching when it has reached the band limit and the BLFLAG
goes HIGH. A search always stops with the FRRFLAG being set and a hardware interrupt.
Figure 3
After this interrupt the TEA5760UK will keep its status and will not update the INTREG,
FRQCHK and TUNCHK tuner registers for a period of 15.625 ms. The state of the
TEA5760UK can be checked by reading tuning registers INTREG, FRQCHK and
TUNCHK.
2
C-bus operates with a maximum clock frequency of 400 kHz.
describes this procedure.
Table 4
CCA
shows the possible states after an auto search or a preset.
Rev. 01 — 14 December 2006
and V
CCD
CCD
. To prevent any uncontrolled control interface response,
, a power-on-reset circuit will generate a reset pulse and
Table
Single chip FM stereo radio
TEA5760UK
8. The power-on reset is
Table
© NXP B.V. 2006. All rights reserved.
8.
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