SAA8200HL Datasheet, PDF (42/71 Pages) NXP Semiconductors – Ensation Base integrated wireless audio baseband

Philips Semiconductors
SAA8200HL
Ensation Base integrated wireless audio baseband
raised cosine roll-off (128 periods of f_s)
interpolator
4-bit output data
(analog representation)
CTRL_INTI[19] (mute)
TRL_INTO[0] (mute state)
Fig 11. Interpolator mute signals
7.20.1.3 Power-down
001aab466
640 periods of f_s
interpolator
4-bit output data
(analog representation)
CTRL_INTI ^[25]
CTRL_INTO ^[1]
TRL_INTO[0] (mute state)
raised
cosine roll-off
(128 periods of f_s)
DC ramp down
(512 periods of f_s)
001aab467
Fig 12. Interpolator power-up and power-down sequence
When the interpolator is powered down (bit CTRL_INTI[25] = 1), the gain in the
interpolator is decreased to −∞ dB to conform to a raised cosine function. This is followed
by a DC ramp down to zero output data (000000h). The slope of this DC ramp can be set
by bit CTRL_INTI[24] to either 512 f_s periods (default) or 1024 f_s periods. The power-up
follows the reverse procedure, a DC ramp up to mid scale plus DC dither (2 to [6 + 2] to
[10 + 2] to 17) followed by a gain increase to conform to a raised cosine function. Total
SAA8200HL_2
Preliminary data sheet
Rev. 02 — 17 October 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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