MSP3405D datasheet(21/71 Pages) ETC

21 / 71 page

MSP 34x5D

PRELIMINARY DATA SHEET

Micronas

6.2. Demodulator Write Registers: Table and Addresses

Table 6–1: Demodulator Write Registers; Subaddress: 10hex; these registers are not readable!

Demodulator

Write Registers

Address

(hex)

Function

Demodulator

Short-

Programming

0020

Write into this register to apply Demodulator Short Programming (see

section 6.4.1.). If the internal setting coincidences with the individual re-

quirements no more of the remaining Demodulator Write Registers have

to be transferred.

AUTO_FM/AM

0021

Only for NICAM (MSP 3415D): Automatic switching between NICAM and

FM/AM in case of bad NICAM reception (see section 6.4.2.)

Write Registers necessary for General Programming Mode only

AD_CV

00BB

input selection, configuration of AGC, Mute Function and selection of

A/D-converter, FM-Carrier-Mute on/off

MODE_REG

0083

mode register

FIR1

FIR2

0001

0005

filter coefficients channel 1 (6

⋅ 8 bit)

filter coefficients channel 2 (6

⋅ 8 bit), + 3 ⋅ 8 bit offset (total 72 bit)

DCO1_LO

DCO1_HI

0093

009B

increment channel 1 Low Part

increment channel 1 High Part

DCO2_LO

DCO2_HI

00A3

00AB

increment channel 2 Low Part

increment channel 2 High Part

PLL_CAPS

001F

switchable PLL capacitors to tune open-loop frequency; to use only if

NICAM of MODE_REG = 0

normally not of interest for the customer

6.3. Demodulator Read Registers: Table and Addresses

Table 6–2: Demodulator Read Registers; Subaddress: 11hex; these registers are not writeable!

Demodulator

Read Registers

Address

(hex)

Function

Result of

Autodetection

007E

see Table 6–13

C_AD_BITS

0023

NICAM-Sync bit, NICAM-C-Bits, and three LSBs of additional data bits

ADD_BITS

0038

NICAM: bit [10:3] of additional data bits

CIB_BITS

003E

NICAM: CIB1 and CIB2 control bits

ERROR_RATE

0057

NICAM error rate, updated with 182 ms

CONC_CT

0058

only to be used in MSPB compatibility mode

FAWCT_IST

0025

only to be used in MSPB compatibility mode

PLL_CAPS

021F

Not for customer use.

AGC_GAIN

021E

Not for customer use.

Note: All NICAM relevant registers are “0” for MSP 3405D.

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