SAA7114HV2 NXP Semiconductors, SAA7114HV2 Datasheet - Page 62
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SAA7114HV2
Manufacturer Part Number
SAA7114HV2
Description
Manufacturer
NXP Semiconductors
Datasheet
1.SAA7114HV2.pdf
(144 pages)
Specifications of SAA7114HV2
Lead Free Status / Rohs Status
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Philips Semiconductors
SAA7114_3
Product data sheet
8.6.2 Signals ASCLK and ALRCLK
See
Remark: For standard applications the synthesized audio clock AMCLK can be used
directly as master clock and as input clock for port AMXCLK (short cut) to generate
ASCLK and ALRCLK. For high-end applications it is recommended to use an external
analog PLL circuit to enhance the performance of the generated audio clock.
Table 22:
Two binary divided signals ASCLK and ALRCLK are provided for slower serial digital
audio signal transmission and for channel-select. The frequencies of these signals are
defined by the following parameters:
See
XTALO (MHz) Field (Hz)
AMCLK = 256
32.11
24.576
AMCLK = 256
32.11
24.576
AMCLK = 256
32.11
24.576
•
•
•
Audio master Clocks Nominal Increment, ACNI[21:0] 36h[5:0] 35h[7:0] 34h[7:0]
according to the equation:
SDIV[5:0] 38h[5:0] according to the equation:
LRDIV[5:0] 39h[5:0] according to the equation:
SDIV[5:0]
LRDIV[5:0]
Table 22
Table 23
Programming examples for audio master clock generation
for examples.
for examples.
=
50
59.94
50
59.94
50
59.94
50
59.94
50
59.94
50
59.94
48 kHz (12.288 MHz)
44.1 kHz (11.2896 MHz)
32 kHz (8.192 MHz)
=
f
-------------------- - 1
2f
AMXCLK
---------------------- -
2f
ASCLK
f
ASCLK
ALRCLK
Rev. 03 — 17 January 2006
–
ACPF
Decimal
245760
205005
-
-
225792
188348
225792
188348
163840
136670
163840
136670
ACNI[21:0]
=
Hex
3 C000
3 20CD
-
-
3 7200
2 DFBC
3 7200
2 DFBC
2 8000
2 15DE
2 8000
2 15DE
round
f
ASCLK
f
---------------------------------------- - 2
crystal frequency
ALRCLK
audio frequency
PAL/NTSC/SECAM video decoder
=
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
ACNI
Decimal
3210190
3210190
-
-
2949362
2949362
3853517
3853 517
2140127
2140127
2796203
2796203
------------------------------------ -
=
SDIV
-------------------------- -
LRDIV 2
f
AMXCLK
f
ASCLK
+
1
SAA7114
23
2
Hex
30 FBCE
30 FBCE
-
-
2D 00F2
2D 00F2
3A CCCD
3A CCCD
20 A7DF
20 A7DF
2A AAAB
2A AAAB
62 of 144
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