Datasheet TEA5767HN (NXP) - 8
| Hersteller | NXP |
| Beschreibung | Low-power FM stereo radio for handheld applications in 40-VFQFN Exposed Pad package |
| Seiten / Seite | 40 / 8 — NXP Semiconductors. TEA5767HN. Low-power FM stereo radio for handheld … |
| Dateiformat / Größe | PDF / 201 Kb |
| Dokumentensprache | Englisch |
NXP Semiconductors. TEA5767HN. Low-power FM stereo radio for handheld applications
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NXP Semiconductors TEA5767HN Low-power FM stereo radio for handheld applications 7.13 Signal dependent mono to stereo blend
With a decreasing RF input level the MPX decoder blends from stereo to mono to limit the output noise. The continuous mono to stereo blend can also be programmed via the bus to an RF level depending switched mono to stereo transition. Stereo Noise Cancelling (SNC) can be switched off via the bus.
7.14 Signal dependent AF response
The audio bandwidth will be reduced with a decreasing RF input level. This function can be switched off via the bus.
7.15 Software programmable ports
Two software programmable ports (open-collector) can be addressed via the bus. The port 1 (pin SWPORT1) function can be changed with write data byte 4 bit 0 (see Table 13). Pin SWPORT1 is then output for the ready flag of read byte 1.
7.16 I2C-bus and 3-wire bus
The 3-wire bus and the I2C-bus operate with a maximum clock frequency of 400 kHz. Before any READ or WRITE operation the pin BUSENABLE has to be HIGH for at least 10 µs. The I2C-bus mode is selected when pin BUSMODE is LOW, when pin BUSMODE is HIGH the 3-wire bus mode is selected. TEA5767HN_5 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 05 — 26 January 2007 8 of 40
Document Outline 1. General description 2. Features 3. Quick reference data 4. Ordering information 5. Block diagram 6. Pinning information 6.1 Pinning 6.2 Pin description 7. Functional description 7.1 Low-noise RF amplifier 7.2 FM mixer 7.3 VCO 7.4 Crystal oscillator 7.5 PLL tuning system 7.6 RF AGC 7.7 IF filter 7.8 FM demodulator 7.9 Level voltage generator and analog-to-digital converter 7.10 IF counter 7.11 Soft mute 7.12 MPX decoder 7.13 Signal dependent mono to stereo blend 7.14 Signal dependent AF response 7.15 Software programmable ports 7.16 I2C-bus and 3-wire bus 8. I2C-bus, 3-wire bus and bus-controlled functions 8.1 I2C-bus specification 8.1.1 Data transfer 8.1.2 Power-on reset 8.2 I2C-bus protocol 8.3 3-wire bus specification 8.3.1 Data transfer 8.3.2 Power-on reset 8.4 Writing data 8.5 Reading data 9. Internal circuitry 10. Limiting values 11. Thermal characteristics 12. Static characteristics 13. Dynamic characteristics 14. FM characteristics 15. I2C-bus characteristics 16. Test information 17. Package outline 18. Soldering 18.1 Introduction to soldering 18.2 Wave and reflow soldering 18.3 Wave soldering 18.4 Reflow soldering 19. Revision history 20. Legal information 20.1 Data sheet status 20.2 Definitions 20.3 Disclaimers 20.4 Trademarks 21. Contact information 22. Contents
NXP Semiconductors TEA5767HN Low-power FM stereo radio for handheld applications 7.13 Signal dependent mono to stereo blend
With a decreasing RF input level the MPX decoder blends from stereo to mono to limit the output noise. The continuous mono to stereo blend can also be programmed via the bus to an RF level depending switched mono to stereo transition. Stereo Noise Cancelling (SNC) can be switched off via the bus.
7.14 Signal dependent AF response
The audio bandwidth will be reduced with a decreasing RF input level. This function can be switched off via the bus.
7.15 Software programmable ports
Two software programmable ports (open-collector) can be addressed via the bus. The port 1 (pin SWPORT1) function can be changed with write data byte 4 bit 0 (see Table 13). Pin SWPORT1 is then output for the ready flag of read byte 1.
7.16 I2C-bus and 3-wire bus
The 3-wire bus and the I2C-bus operate with a maximum clock frequency of 400 kHz. Before any READ or WRITE operation the pin BUSENABLE has to be HIGH for at least 10 µs. The I2C-bus mode is selected when pin BUSMODE is LOW, when pin BUSMODE is HIGH the 3-wire bus mode is selected. TEA5767HN_5 © NXP B.V. 2007. All rights reserved.
Product data sheet Rev. 05 — 26 January 2007 8 of 40
Document Outline 1. General description 2. Features 3. Quick reference data 4. Ordering information 5. Block diagram 6. Pinning information 6.1 Pinning 6.2 Pin description 7. Functional description 7.1 Low-noise RF amplifier 7.2 FM mixer 7.3 VCO 7.4 Crystal oscillator 7.5 PLL tuning system 7.6 RF AGC 7.7 IF filter 7.8 FM demodulator 7.9 Level voltage generator and analog-to-digital converter 7.10 IF counter 7.11 Soft mute 7.12 MPX decoder 7.13 Signal dependent mono to stereo blend 7.14 Signal dependent AF response 7.15 Software programmable ports 7.16 I2C-bus and 3-wire bus 8. I2C-bus, 3-wire bus and bus-controlled functions 8.1 I2C-bus specification 8.1.1 Data transfer 8.1.2 Power-on reset 8.2 I2C-bus protocol 8.3 3-wire bus specification 8.3.1 Data transfer 8.3.2 Power-on reset 8.4 Writing data 8.5 Reading data 9. Internal circuitry 10. Limiting values 11. Thermal characteristics 12. Static characteristics 13. Dynamic characteristics 14. FM characteristics 15. I2C-bus characteristics 16. Test information 17. Package outline 18. Soldering 18.1 Introduction to soldering 18.2 Wave and reflow soldering 18.3 Wave soldering 18.4 Reflow soldering 19. Revision history 20. Legal information 20.1 Data sheet status 20.2 Definitions 20.3 Disclaimers 20.4 Trademarks 21. Contact information 22. Contents