saa8115hl NXP Semiconductors, saa8115hl Datasheet - Page 13
saa8115hl
Manufacturer Part Number
saa8115hl
Description
Saa8115hl-04 Digital Camera Usb Interface
Manufacturer
NXP Semiconductors
Datasheet
1.SAA8115HL.pdf
(51 pages)
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Philips Semiconductors
9397 750 07395
Product specification
Fig 5. I
2
C-bus interface and register map.
8.9 Audio
microcontroller
The SAA8115HL contains a microphone supply and an amplifier circuit composed of
two stages: a Low Noise Amplifier (LNA) and a variable gain amplifier. The LNA has a
fixed gain of 26 dB while the variable gain amplifier can be programmed
between 0 and 30 dB by steps of 2 dB. The gain control can be done via either the
SNERT interface or the I
first selected using bit SIS (see
audio path must be controlled via external high-pass or low-pass filters.
The PLL converts the 48 MHz to 256f
modes for the PLL to achieve the sample frequencies of 48, 44.1 or 32 kHz
(see
The bitstream ADC samples the audio signal. It runs at an oversample rate of
256 times the base sample rate. In the application, the bitstream can be converted to
parallel 16-bit samples. This conversion is programmable with respect to the effective
sample frequency (dropping sample results in a lower effective sample frequency)
and sample resolution. As a result the effective sample rate can be determined.
to/from
Table
INTERFACE
I
5).
2
C-BUS
PI_Address
PI_Address
Rev. 04 — 10 August 2000
10
0X
2
C-bus interface (see
INTERPRETER
COMMAND
PSIE-MMU
(DE)MUX
Table
to
s
60). The frequency transfer characteristic of the
(f
s
= audio sample frequency). There are three
Table
REGISTERS
VIDEO FIFO
SET MODE
REGISTER
REGISTER
PSIE-MMU
NON USB
SPACE
SPACE
60). The serial interface must be
AND
Digital camera USB interface
FCE432
SAA8115HL
© Philips Electronics N.V. 2000. All rights reserved.
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