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TEA5764HN Datasheet(PDF) 11 Page - NXP Semiconductors |
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TEA5764HN Datasheet(HTML) 11 Page - NXP Semiconductors |
11 / 64 page TEA5764HN_2 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Product data sheet Rev. 02 — 9 August 2005 11 of 64 Philips Semiconductors TEA5764HN FM radio + RDS 8.19.2 RDS data and clock direct The RDS demodulator retrieves the RDS data and clock signals, this data can be put directly onto pins VAFL and VAFR by setting bit RDSCDA to logic 1. 8.19.2.1 RDS/RBDS decoder The RDS decoder provides block synchronization, error correction and flywheel function for reliable extraction of RDS or RBDS block data. Different modes of operation can be selected to fit different application requirements. Availability of new data is signalled by bit DAVFLG and output pin INTX which generates an interrupt. Up to two blocks of data and status information are available via the I2C-bus in a single transmission. The behavior of the DAVFLG is described in Section 10. 8.20 Audio pause detector The audio pause detector monitors the audio modulation for pauses and responds to low levels. The modulation threshold can be adjusted in 4 steps of 4 dB by control bits PL[1:0]. The minimum time for detecting a pause can be adjusted by control bits PT[1:0] as shown in Table 38. When a pause occurs, flag PDFLAG is set to logic 1 and a hardware interrupt is generated; see Section 9.1.4.6. 8.21 Auto search and Preset mode In Search mode the TEA5764HN can search channels automatically; see Figure 3. |
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