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TEA5767HN Datenblatt(PDF) 8 Page - NXP Semiconductors |
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TEA5767HN Datenblatt(HTML) 8 Page - NXP Semiconductors |
8 / 39 page TEA5767HN_4 © Koninklijke Philips Electronics N.V. 2006. All rights reserved. Product data sheet Rev. 04 — 20 February 2006 8 of 39 Philips 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. |
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