PCF5083HSLASHF2 datasheet(63/136 Pages) PHILIPS

63 / 136 page

1996 Oct 29

Philips Semiconductors

Objective speciﬁcation

GSM signal processing IC

PCF5083

9.3

GSM baseband procedures

The baseband procedures with optional input parameters can be called by the EXEC_PROC command as described in

Section 9.2. Return values are packed in the PROC_RETURN indication. Every procedure deals with the following types

of data:

• Input parameters which are directly supplied by the System Controller

• Return values which are automatically sent to the System Controller as soon as the procedure is completed

• Input and output data buffers located in the DSP data RAM. They are used for communication with other procedures.

Most of the procedures use a common buffer SCRATCH_BUFF for their input and output data. Only a small number

of procedures need specific buffer for input or output. In this case there are one or two additional parameters in_buff_id

or out_buff_id which determine the buffers where input and output data are located. In Table 55 a list of all available

buffers is given.

For all trailing parameters of a procedure which are not transmitted with the EXEC_PROC command a default value of

zero is used.

Table 55 Data buffers for baseband procedures

Notes

1. X = don’t care.

MNEMONIC

ID(1)

SIZE

DESCRIPTION

VERSION_BUFF

0X8000

Contains the BCD coded version numbers of all software packages (order:

MP, BB, CI, CM, DB, EM, FB, SP and TP). A version number 0Xmm.ss

means version mm.ss.

SCRATCH_BUFF

0X8001

167

Scratch buffer for communication between arbitrary modules.

TCH_CMI_BUFF

0X8002

116

The combination of the 4 buffers; TCH_CMI_BUFF1 to TCH_CMI_BUFF4.

TCH_CMI_BUFF1

0X8003

Used to store the CMI values of 4 consecutive bursts belonging to one TCH

block.

TCH_CMI_BUFF2

0X8004

TCH_CMI_BUFF3

0X8005

TCH_CMI_BUFF4

0X8006

CCH_CMI_BUFF

0X8007

116

The combination of the 4 buffers; CCH_CMI_BUFF1 to CCH_CMI_BUFF4.

CCH_CMI_BUFF1

0X8008

Used to store the CMI values of 4 consecutive bursts belonging to one

CCH block.

CCH_CMI_BUFF2

0X8009

CCH_CMI_BUFF3

0X800A

CCH_CMI_BUFF4

0X800B

CCH_INFO_BUFF

0X800C

The combination of the 4 buffers;

CCH_INFO_BUFF1 to CCH_INFO_BUFF4.

CCH_INFO_BUFF1

0X800D

Used to store the information bits 4 bursts belonging to one CCH block.

CCH_INFO_BUFF2

0X800E

CCH_INFO_BUFF3

0X800F

CCH_INFO_BUFF4

0X8010

TCH_LOOP_BUFF

0X8011

Used to store four normal bursts during TCH loop-back operation. Note this

buffer is also used by the speech encoder.

MP_CONTROL_BUFF

0X8013

Used to control several features of the ﬁrmware; see Table 56.

IQ_BUFF

0X8018

334

Used to store I and Q components from the PCF5072. This buffer is

overlaid with SCRATCH_BUFF.

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