TEA5777 NXP Semiconductors, TEA5777 Datasheet - Page 15

• Manufacturer Part Number: TEA5777
• Manufacturer: NXP Semiconductors

Specifications of TEA5777

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Philips Semiconductors
TEA5777_1
Product data sheet
8.5 RF level information (RSSI)
8.6 Software programmable ports
For processing Receiver Signal Strength Information (RSSI) in both AM and FM modes,
the internal level voltage is analog-to-digital converted with a 4-bit ADC. The level
information can be read by bits LEV[3:0] in the read register. In autonomous search mode,
bits LEV[3:0] still indicate some momentary level information, however the data is
dependent upon the readout timing and can be considered to have no relevance to the
user. The ADC full-scale goes from 0.25 V to 0.95 V. In AM mode, the level information
covers the ADC full-scale. In FM mode, the level information does not fully cover the ADC
full-scale.
Two software programmable ports can be addressed via the bus control. These ports can
be independently switched to multiple functions, knowing:
Remark: Port SWPORT2 can be switched as input for the 13 MHz reference signal. In
that case, no other functions can be programmed for this port.
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Outputs: SWPORT1 and SWPORT2 can act as output ports which are capable of
sourcing and sinking approximately 9 mA.
Inputs: SWPORT1 and SWPORT2 can act as input ports of which the status can be
read out via bus control.
Rev. 01 — 11 April 2006
Low-power AM/FM stereo radio for handheld applications
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
TEA5777
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