Technical Note
14/30
BD5446EFV
www.rohm.com
2010.05 - Rev.B
© 2010 ROHM Co., Ltd. All rights reserved.
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Power supply start-up sequence
VCCP1 (53, 54pin)
VCCP2 (28, 29pin)
VCCA (25pin)
REG_G1 (1pin)
REG_3 (5pin)
PDX (14pin)
BCLK (8pin)
LRCLK (9pin)
Speaker output
SDATA1 (10pin)
SDATA2 (11pin)
REG_G2 (27pin)
①Power up VCCA, VCCP1, VCCP2 simultaneously.
REG_G1, REG_G2
REG_3
③Degital audio data communication.
④Set PDX to High.
⑤Set MUTEX to High.
OUT_DAC2 (22pin)
OUT_DAC1 (23pin)
t
t
t
t
t
t
t
MUTEX (13pin)
RESETX (12pin)
②Set RESETX to High after power up.
t
SYS_CLK (7pin)
Soft-start
43msec(fs=48kHz)
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