PNX0161

General description

Recent development in mobile phones is to have the phone equipped with a USB micro A plug as a single plug for charging and connection to all enhancements (like a headset, but also for other enhancements like GPS accessories etc.)

The PNX0161 is based on an ARM7TDMI CPU core with data/instruction cache of 8 kB and USB 2.0 FS device interface.

Features

General features

• Enables one chip solution for USB headset.
• Requires very low power.
• Supports FM radio input including low-power audio bypass mode.
• Is available in a small footprint package TFBGA88 of 7 x 7 sq. mm with 0.5 mm pitch.

Hardware features

• ARM7TDMI processor core with 8 kB data/instruction cache.
• Embedded SRAM, 32 kB.
• Embedded ROM memory for storing the boot code, 32 kB.
• Embedded flash memory for storing the program code, 256 kB (second production version will be ROM based).
• Integrated USB 2.0 full-speed device interface.
• Intelligent configuration power management.
• Embedded high-efficiency power supply unit powered from a USB supply.
• Supports power optimization by optimizing supply voltages.
• Embedded DMA controller.
• Digital interfaces:
  • Integrated stereo ADC with programmable amplifier (microphone, line input and tuner input).
  • Integrated IIS input and output interfaces (configurable for master/slave options).
  • Integrated fast UART with DMA support.
  • Integrated master/slave I²C interface.
• Analog interfaces:
  • Integrated stereo ADC with programmable amplifier (microphone, line input and tuner input).
  • Microphone bias block.
  • Integrated stereo DAC with Class-AB headphone amplifier for high quality audio with increased driving capabilities and for use in tuner applications.
  • The integrated ADC and DAC both have a 24 bits data path.
• Two integrated general purpose timers.
• Integrated watchdog timer.
• Low-power tuner mode with direct connection between tuner input and Class-AB headphone amplifier with analog volume control.
• JTAG interface with boundary scan and ARM debug access.

Software features

This section lists the software features that the PNX0161 is capable of performing.

• Playback: playback by the headphones of a received USB audio stream from the USB host via the DAC.
• Recording: audio stream converted by the ADC from the microphone is sent via the USB audio stream to the USB host.
• Phone call: in addition to the first case, simultaneously returning a USB audio stream that is converted by the ADC from the microphone. The microphone is mixed to the headphone stream, known as side-tone mixing.
• Tuner listening: the FM tuner audio stream is sent to the headphones. No stream is sent or received via USB.
• Tuner recording: the FM tuner audio stream is sent to the headphones. In addition the FM tuner stream is streamed to the phone via USB.
• USB HID class for FM tuner RDS info.
• USB device firmware upgrade.
• Intelligent power management software.
• Audio postprocessing features like volume control.

Software features on request

This section lists the software features that the PNX0161 is capable of performing.

• Audio source selection between line-in and USB audio in for playback path, by toggling GPIO pin.
• Support for stereo recording from analog and I²S inputs at sample rates other than 48 kHz.
• Support for stereo playback from USB audio, I²S and analog inputs at sample rates other than 48 kHz.
• Option for a "direct analog link" for playback applications where only volume control is performed in the PNX0161. The "direct analog link" provides a full analog audio path through the PNX0161 from the analog stereo line input to the low output impedance buffer output through an analog volume control block. When the option is not selected, the analog stereo input is converted to the digital domain by the on-chip ADC. Audio postprocessing is performed in the digital domain. The processed signals are then converted back to analog by the on-chip DAC and fed to the analog outputs through the low impedance output buffer.
• Digital EQ for loudspeaker characteristics compensation.
• For audio rendering applications: digital bass boost, treble expander, stereo widening, FM radio acoustical performance improvement and other NXP software LifeVibes music algorithms.
• For applications as USB (mobile)-phones hands-free teleconference stations: Full duplex acoustic echo cancellation, intelligibility improvement and other NXP software LifeVibes voice algorithms.

Products/packages

Type number	North American Type number	Ordering code (12NC)	Product status	Package	Packing	Marking	Chemical content	Leadfree conversion date
PNX0161ET/N101		9352 833 66118	Volume production	SOT951-1 (TFBGA88)	Reel Pack, SMD, 13"	Standard Marking	PNX0161ET/N101
PNX0161ET/N101		9352 833 66157	Volume production	SOT951-1 (TFBGA88)	Tray Pack, Bakeable, Multiple	Standard Marking	PNX0161ET/N101

Pricing/ordering/availability

Type number	Ordering code(12NC)	Indicative price/unit($)	Region	Distributor	In stock	Inventory date	Buy online	Samples
PNX0161ET/N101	9352 833  66118							Order samples
PNX0161ET/N101	9352 833  66157							not available

Applications

• USB headset
• FM radio USB headset
• Docking station

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