WM8985GEFL Wolfson Microelectronics, WM8985GEFL Datasheet - Page 71

• Manufacturer Part Number: WM8985GEFL
• Description: Audio CODECs Multimedia CODEC with Class D HP
• Manufacturer: Wolfson Microelectronics

Specifications of WM8985GEFL

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Production Data
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Table 36 OUT2 Volume Control
ZERO CROSS TIMEOUT
Table 37 Timeout Clock Enable Control
A zero-cross timeout function is provided so that if zero cross is enabled on the input or output PGAs
the gain will automatically update after a timeout period if a zero cross has not occurred. This is
enabled by setting SLOWCLKEN. The timeout period is dependent on the clock input to the digital
and is equal to 2
Note: SLOWCLKEN is also used for the jack insert detect debounce circuit
R54 (36h)
LOUT2
Volume
control
R55 (37h)
ROUT2
Volume
control
R7 (07h)
Additional
Control
REGISTER
ADDRESS
REGISTER
ADDRESS
21
5:0
6
7
8
5:0
6
7
8
* SYSCLK period.
0
BIT
BIT
LOUT2VOL
LOUT2MUTE
LOUT2ZC
OUT2VU
ROUT2VOL
ROUT2MUTE
ROUT2ZC
OUT2VU
SLOWCLKEN
LABEL
LABEL
0
DEFAULT
Not latched
Not latched
DEFAULT
111001
111001
0
0
0
0
Slow clock enable
0 = slow clock disabled
1 = slow clock enabled
(1dB steps)
000000 = -57dB
...
111001 = 0dB
...
111111 = +6dB
0 = Normal operation
1 = Mute
LOUT2 volume zero cross enable:
1 = Change gain on zero cross only
0 = Change gain immediately
LOUT2 and ROUT2 volumes do not
update until a 1 is written to SPKVU
(in reg 54 or 55)
Right output volume:
(1dB steps)
000000 = -57dB
...
111001 = 0dB
...
111111 = +6dB
0 = Normal operation
1 = Mute
ROUT2 volume zero cross enable:
1 = Change gain on zero cross only
0 = Change gain immediately
LOUT2 and ROUT2 volumes do not
update until a 1 is written to SPKVU
(in reg 54 or 55)
Left output volume:
Left output mute:
Right output mute:
DESCRIPTION
DESCRIPTION
PD, Rev 4.6, July 2009
WM8985
71