SAA7324H NXP Semiconductors, SAA7324H Datasheet - Page 17

• Manufacturer Part Number: SAA7324H
• Manufacturer: NXP Semiconductors

Specifications of SAA7324H

• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
7.8
7.8.1
The onboard bitstream DAC operates at a clock frequency of 96f
Optimum performance is dependent on the application circuit used and careful consideration should be given to the
recommended application circuits shown in Figs 38 and 39. The onboard DAC is controlled from shadow register 7
(see Section 7.15.3 for definition of shadow registers). This shadow register controls routing of data into the onboard
DAC and also controls the DAC output pins, which can be held at zero when the onboard DAC is not required; see
Table 4:
Audio data from the decoder part of the SAA7324 can be routed as described in Sections 7.8.1.1 and 7.8.1.2.
Table 4 Shadow register
7.8.1.1
Setting shadow register 7 to XX11 will route audio data
from the CD10 decoder into the internal DAC, and enables
the DAC output pins (LN, LP, RN and RP). To enable the
on-board DAC, the DAC interface format (set by register 3)
must be set to 16-bit 1f
CD-ROM mode can also be used if interpolation is not
required. The serial data output pins for interfacing with an
external DAC (SCLK, WCLK, DATA and EF) are set to
high-impedance.
7.8.1.2
The onboard DAC can also be set to accept serial data
inputs from an external source, e.g. an Electronic Shock
Absorption (ESA) IC. This is known as loopback mode and
is enabled by setting shadow register 7 to XX01.
2000 Jun 26
Digital servo processor and Compact Disc
decoder with integrated DAC (CD10 II)
SHADEN
DAC interface
1
I
NTERNAL BITSTREAM DIGITAL
Use onboard DAC
Loopback external data into onboard DAC
ADDRESS
SHADOW
0111 (7H)
s
mode, either I
control of
onboard DAC
-
REGISTER
TO
2
S or EIAJ format.
-
ANALOG CONVERTER
DATA
XXX0
XXX1
XX0X
XX1X
17
(DAC)
This enables the serial data output pins (SCLK, WCLK,
DATA and EF) so that data can be routed from the
SAA7324 to an external ESA system (or external DAC).
The serial data from an external ESA IC can then also be
input to the onboard DAC on the SAA7324 by utilising the
serial data input interface (SCLI, SDI and WCLI).
In this mode, a wide range of data formats to the external
ESA IC can be programmed as shown in Table 5.
However, the serial input on the SAA7324 will always
expect the input data from the ESA IC to be 16-bit 1f
the same data format, either I
output format (set by decoder register 3).
s
hold onboard DAC outputs at zero
enable onboard DAC outputs
use external DAC or route audio data into
onboard DAC (loopback mode)
route audio data into onboard DAC
(non-loopback mode)
and is designed for operation with an audio input at 1f
FUNCTION
2
S-bus or EIAJ, as the serial
Product specification
SAA7324
RESET
reset
reset
s
and
s
.