WM8903 Datasheet, PDF (52/178 Pages) Wolfson Microelectronics plc – Ultra Low Power CODEC for Portable Audio Applications

WM8903
Production Data
INITIALISATION
When the DRC is initialised, the gain is set to the level determined by the DRC_STARTUP_GAIN
register field. The default setting is 0dB, but values from -18dB to +36dB are available, as described
in Table 23.
REGISTER
ADDRESS
R40 (28h)
DRC 0
BIT
LABEL
10:6 DRC_STARTUP_
GAIN [4:0]
Table 23 DRC Initialisation
DEFAULT
DESCRIPTION
00110
Initial gain at DRC startup
00000 = -18dB
00001 = -15dB
00010 = -12dB
00011 = -9dB
00100 = -6dB
00101 = -3dB
00110 = 0dB (default)
00111 = 3dB
01000 = 6dB
01001 = 9dB
01010 = 12dB
01011 = 15dB
01100 = 18dB
01101 = 21dB
01110 = 24dB
01111 = 27dB
10000 = 30dB
10001 = 33dB
10010 = 36dB
10011 to 11111 = Reserved
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PD, Rev 4.5, June 2012
52