WM9082 WOLFSON [Wolfson Microelectronics plc], WM9082 Datasheet - Page 14

• Manufacturer Part Number: WM9082
• Description: PDM Input Mono 3W Class D Speaker Driver
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM9082
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Table 7 WM9082 Start-Up Events
STANDBY EVENTS
The WM9082 Class D output is disabled whenever the PDM input data is interrupted, or when a valid
Standby Control Code is detected. The WM9082 Standby transition is selected during normal
operation (ie. from the “ON” state”) under any of the conditions described in Table 8. Each of these
conditions results in a transition to the “STANDBY” state.
Table 8 WM9082 Standby Events
Note that repeated instances of any Control Code will not cause more than one state transition until
audio data or a different Control Code has been received. This prevents the WM9082 from cycling
between the “ON” state and the “STANDBY” state in the event of repeated Control Codes.
SHUTDOWN EVENTS
If the CLK input is not present at any time, this results in a transition to the “OFF” state. The WM9082
will remain in the “OFF” state until the CLK input restarts.
64 x Any Control Code
PDM audio data
Error condition
32 x Code 10
CONDITION
32 x Code 9
CONDITION
32 x Code 2
4 x Code 1
Fast start-up for default SPKVDD condition (SPKVDD = 3.6V)
Start-up for SPKVDD = 3.6V
Start-up for SPKVDD = 5.0V
Fast start-up
Standby command - selects STANDBY state
Selects STANDBY state
Selects STANDBY state
(An error condition is detected if >24 consecutive 1’s or >24
consecutive 0’s is received on the PDM audio interface.)
DESCRIPTION
DESCRIPTION
PD, August 2012, Rev 4.1
Production Data
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