WM8978 Wolfson Microelectronics Ltd., WM8978 Datasheet - Page 97

• Manufacturer Part Number: WM8978
• Description: The WM8978 is a low power, high quality stereo codec designed for portable applications such as Digital still camera or Digital Camcorde
• Manufacturer: Wolfson Microelectronics Ltd.

Preliminary Technical Data
w
53 (35h)
54 (36h)
55 (37h)
56 (38h)
REGISTER
ADDRESS
5:0
8
7
6
5:0
8
7
6
5:0
8
7
6
5:0
8:7
6
5:4
BIT
LOUT1VOL
HPVU
ROUT1ZC
ROUT1MUTE
ROUT1VOL
SPKVU
LOUT2ZC
LOUT2MUTE
LOUT2VOL
SPKVU
ROUT2ZC
ROUT2MUTE
ROUT2VOL
OUT3MUTE
LABEL
111001
N/A
0
0
111001
N/A
0
0
111001
N/A
0
0
111001
00
0
00
DEFAULT
Left headphone output volume:
000000 = -57dB
...
111001 = 0dB
...
111111 = +6dB
LOUT1 and ROUT1 volumes do not update until
a 1 is written to HPVU (in reg 52 or 53)
Headphone volume zero cross enable:
1 = Change gain on zero cross only
0 = Change gain immediately
Right headphone output mute:
0 = Normal operation
1 = Mute
Right headphone output volume:
000000 = -57dB
...
111001 = 0dB
...
111111 = +6dB
LOUT2 and ROUT2 volumes do not update until
a 1 is written to SPKVU (in reg 54 or 55)
Speaker volume zero cross enable:
1 = Change gain on zero cross only
0 = Change gain immediately
Left speaker output mute:
0 = Normal operation
1 = Mute
Left speaker output volume:
000000 = -57dB
...
111001 = 0dB
...
111111 = +6dB
LOUT2 and ROUT2 volumes do not update until
a 1 is written to SPKVU (in reg 54 or 55)
Speaker volume zero cross enable:
1 = Change gain on zero cross only
0 = Change gain immediately
Right speaker output mute:
0 = Normal operation
1 = Mute
Right speaker output volume:
000000 = -57dB
...
111001 = 0dB
...
111111 = +6dB
Reserved
0 = Output stage outputs OUT3 mixer
1 = Output stage muted – drives out VMID. Can
be used as VMID buffer in this mode.
Reserved
DESCRIPTION
PTD Rev 2.6 November 2005
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
Analogue
Outputs
REFER TO
WM8978
97