LSI Logic Confidential
16-4
Clock Control and Power Management
Copyright © 2001, 2002 by LSI Logic Corporation. All rights reserved.
SD Mode
[16:15]
Sigma-Delta Mode. Selects sigma delta noise shaping
algorithm for the audio PLLs. This field should normally
be set to zero. Default value equals 0x0.
Test Mode
[14:12]
Enables crystal oscillator, system PLL, video PLL,
audioIn PLL and audioOut PLL outputs to be sent to the
TDO pin for testing purposes as shown below. This field
is reset to zero by software. Whenever this field is not 0,
the TDO output enable would be asserted also
.
Default
value equals 000
XCO Adj
[11:7]
The frequency offset of the internal crystal oscillator from
its nominal 13.5 MHz operating point in sign magnitude
format in the range of
−
15 to +15. The maximum positive
and negative offsets correspond to a frequency
adjustment of
±
100 ppm. The frequency adjustment can
only be applied when a 13.5 MHz crystal is used. This
field is reset to 01111. For proper operation of the crystal
oscillator, software should not change the value of
Adj[4:0] by more than one count every 100 ms. For
example, if the current value of Adj[4:0] is 00000, but the
desired final value is 3, the following update sequence
should be issued:
Change Adj[4:0] to 1; Wait at least 100 ms
Change Adj[4:0] to 2; Wait at least 100 ms
Change Adj[4:0] to 3
Default value equals 0x0F
Test Mode
Value
MlclockO Output
0
Normal audio input master clock
1
Crystal oscillator out
2
System PLL VCO out
3
VideoOut PLL VCO out
4
AudioIn PLL VCO out
5
AudioOut PLL VCO out
Содержание DMN-8600
Страница 14: ...LSI Logic Confidential xiv Contents Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...
Страница 18: ...LSI Logic Confidential xviii Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...
Страница 64: ...LSI Logic Confidential 7 6 Memory Mapping Copyright 2001 2002 by LSI Logic Corporation All rights reserved ...