Datasheet

DR
AFT
DR
AFT
DRAFT
DR
D
RAFT
DRAFT
DRA
F
T DRAF
D
RAFT DRAFT DRAFT DRAFT DRAFT D
DRAFT
D
RAFT DRA
F
T DRAFT DRAFT DRAFT DRA
LPC3152_3154 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved.
Preliminary data sheet Rev. 0.12 — 27 May 2010 42 of 88
NXP Semiconductors
LPC3152/3154
7.2 Audio codec
7.2.1 Stereo Digital-to-Analog Converter (SDAC)
The Stereo Digital-to-Analog Converter converts a digital audio signal into an analog
audio signal. The output of this module is connected to the input of the class AB
headphone amplifier.
This module has the following features:
• Stereo Digital-to-Analog converter with support for 24-bit audio samples.
• Supports sample rates from 8 kHz up to 96 kHz.
• Filter implementations have a 24-bit data path with 16-bit coefficients.
• Full FIR filter implementation for all of the up-sampling filters.
Fig 11. Block diagram of the analog die
from USB_VBUS
PSU_VBAT1, PSU_VBAT2,
PSU_VIN1
PSU_VBAT
PSU_VBUS
CHARGE_VBUS
PSU_VOUT1
PSU_STOP
PSU_PLAY
PSU_VOUT2
PSU_VOUT3
PSU_LX1, PSU_LX2
to USB device
CHARGE_VBAT
PSU
AUDIO
CODEC
I
2
C
USB
CHARGE
PUMP
REAL-TIME
CLOCK
Li-ION
CHARGER
I
2
S
ADC_VINR, ADC_VINL,
ADC_MIC, ADC_ TINR,
ADC_TINL
ADC_VREFP, ADC_VREFN
ADC_VREF
ANALOG
INPUT
ANALOG
OUTPUT
HP_OUTR, HP_OUTL,
HP_OUTC
HP_VREF, HP_FCR, HP_FCL
DAC_VREFP, DAC_VREFN
to I
2
C1 (digital die)
to I
2
S1 (digital die)
CHARGE_CC_REF
CHARGE_VSS
CHARGE_VNTC,
CHARGE_BAT_SENSE
UOS_VBUS
UOS_CX1, UOS_CX2
UOS_VBAT
FSLOW_IN
FSLOW_OUT
RTC_INT
RTC_CLK32
RTC_BACKUP
RTC_VDD36
LPC3152/3154
to supply pins
Li-ion battery
002aae754
ANALOG DIE