PCF5083HSLASH5V2SLASHF3 datasheet(61/136 Pages) PHILIPS

61 / 136 page

1996 Oct 29

Philips Semiconductors

Objective speciﬁcation

GSM signal processing IC

PCF5083

9.2.1

EXECUTION OF GSM BASEBAND PROCEDURES

The EXEC_PROC commands initiate the execution of

internal procedures. The procedure specified by proc_id is

executed within the DSP. The input parameters of the

procedure are part of the message. The return values (if

any) of the procedure and the msg_id parameter are

packed to a PROC_RETURN indication.

Several commands can be combined with the PACKET

command to reduce overhead especially when sending

commands to the DSP in polling mode.

9.2.2

NO OPERATION (NOP) COMMAND

This NOP command may be used for debugging

purposes. It is ignored by the DSP. The length of the data

field has to be at least one word.

9.2.3

SOFT RESETTING THE DSP

The RESET command causes the DSP to perform a soft

reset. It is executed immediately after the current running

procedure is completed. Depending on the reset

parameter (see Table 53) the input and/or output

command queues are cleared. It is possible to reset more

than one FIFO or queue, by setting the appropriate bits.

Table 53 Parameter of RESET message

Note

1. X = don’t care.

MNEMONIC

VALUE(1)

DESCRIPTION

RESET_ALL

0X0000

Restart main program (soft reset), clear all buffers and queues and

all external memory.

OUTPUT_MESSAGE_QUEUE

0X0001

Clear the output message queue.

INPUT_MESSAGE_QUEUE

0X0002

Clear the input message queue.

BBD_IN_FIFO

0X0004

Clear the baseband digitizer input FIFO.

MOD_OUT_FIFO

0X0008

Clear the GMSK modulator output FIFO.

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