Cirrus Logic CS4970x4 - Manual (Page 158)

Introduction
CS4953x4/CS4970x4 System Designer’s Guide
DS810UM6 Copyright 2013 Cirrus Logic, Inc C-5
C.1.8 Dolby Virtual Speaker
®
2
See the Cirrus Logic application note, AN246MPL for a complete description of the Dolby Virtual Speaker
2 (DVS2) firmware module.
C.1.8.1 Loading Dolby Virtual Speaker 2
The host commands necessary to load Dolby Virtual Speaker 2 are:
UCMD Ef00000000000100
UCMD Ef000009000p000q
UCMD Ef00000000000001
p = DVS2 mode, q= DVS2 uld id as per flash.h
C.1.8.2 Loading Dolby Virtual Speaker 2 with Dolby ProLogic II
The host commands necessary to load Dolby Virtual Speaker 2 along with Dolby ProLogic II are:
UCMD Ef00000000000100
UCMD Ef000008000p000q
UCMD Ef000009000r000s
UCMD Ef00000000000001
p = PL2x_A mode, q = PL2x_A uld id as per flash.h
r = DVS2 mode, s = DVS2 uld id as per flash.h
C.1.8.3 Removing Dolby Virtual Speaker 2
DVS 2 can be removed by the following commands:
UCMD Ef00000000000100
UCMD Ef000008000p000q
UCMD Ef00000900000000
UCMD Ef00000000000001
C.1.9 Dolby Headphone
®
2
See the Cirrus Logic application note, AN246MPK for a complete description of the Dolby Headphone 2
firmware module.
C.1.9.1 Loading Dolby Headphone 2
The host commands necessary to load Dolby Headphone 2 are:
UCMD Ef00000000000100
UCMD Ef000009000p000q
UCMD Ef00000000000001
p = DH2 mode, q= DH2 uld id as per flash.h