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PCF5083 Datasheet(PDF) 81 Page - NXP Semiconductors |
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PCF5083 Datasheet(HTML) 81 Page - NXP Semiconductors |
81 / 136 page 1996 Oct 29 81 Philips Semiconductors Objective specification GSM signal processing IC PCF5083 MP_convert_cmi This procedure may be used to make a loopback between equalizer output and burst builder input. It converts the 114 soft outputs (CMIs) of the equalizer located in cmi_buff_id into 114 ‘hard’ bits. These bits are stored in buffer info_buff_id. 22 cmi_buff_id info_buff_id − MP_exec_reset This procedure is used to execute a reset synchronous to the input message queue. The difference to the RESET message is, that this procedure is not executed immediately after it is found in the input queue. The reset_action is the same as the one of the RESET message. 60 reset_action − MP_if_enough_audio_in_samples This procedure is used for conditional execution of procedures. The following n_procs procedures are executed if the audio input FIFO contains at least n_samples samples, otherwise the procedures are skipped. 42 n_samples n_procs − MP_iom2_disable This procedure disables the IOM®-2 interrupts of the DSP. This results in a reduced computational load of the DSP and therefore also in reduced power consumption. 44 −− MP_iom2_enable This procedure enables the IOM®-2 interrupts of the DSP. Sending or receiving data over the IOM®-2 interface is only possible if this procedure has been called. After reset the IOM®-2 interrupts are disabled. After the call of MP_iom2_enable the audio FIFOs are initialized as follows: The audio input FIFO contains 1 sample (value = 0xFFFD) and the audio output FIFO contains 148 samples (value = 0xFFFD). This procedure must therefore be called before the MP_AUDIO_SYNC procedure. 45 −− MP_offset_compensation This procedure performs offset measurement and compensation. The following function is performed: (i_offset, q_offset) = EM_offset_measurement (n_samples) MP_read_bbd_in_FIFO_init (i_offset, q_offset). 63 −− MP_read_audio_in_fifo n_words words from the audio data input FIFO are copied to the buffer buff_id in the DSP data memory. This FIFO collects the audio samples from the ADC converter located in the handset. The procedure waits until the FIFO contains sufficient data. The time-out is expressed in steps of 100 µs. If time-out occurs a TIMEOUT_AUDIO_IN_FIFO error message is automatically sent to the SC. 46 buff_id n_words timeout_val − DESCRIPTION ID PARAMETERS RETURN VALUES |
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