PCF5083HSLASH5V2SLASHF3 datasheet(81/136 Pages) PHILIPS

81 / 136 page

1996 Oct 29

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.

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.

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.

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.

−−

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.

−−

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).

−−

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.

buff_id

n_words

timeout_val

−

DESCRIPTION

PARAMETERS

RETURN

VALUES

PCF5083H/5V2/F3 数据表(PDF) 81 Page - NXP Semiconductors

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