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9397 750 13928 © Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data Rev. 03 – 23 August 2004 23 of 31
Philips Semiconductors
PNX2000
Audio video input processor
The supported crystal/external clock frequencies are 27 MHz and 13.5 MHz. The crystal
oscillator is followed by a selectable divide-by-two frequency divider giving three available
clock frequencies, as shown in Tabl e 25
.
The crystal specification is:
• Package: surface mount.
• Accuracy: (±50 ppm).
• Temperature: (±50 ppm).
• Operating temperature range: −20 to +70
o
C.
• Load capacitance: 30 pF.
Fig 4. Application diagram: (a) slave/test mode, (b) oscillation mode
Table 25: Primary clock settings
Clock/Crystal Input Divider setting Clock frequency
27 MHz x/1 27 MHz
27 MHz x/2 13.5 MHz
13.5 MHz x/1 13.5 MHz
13.5 MHz x/2 6.75 MHz
Table 26: Crystal parameters
Oscillator
frequency (f
c
)
Crystal load
capacitance (C
L
)
Max.crystal series
resistance (R
S
)
External load
capacitors (Cx1; Cx2)
13.5 MHz
10 pF < 600
Ω 2 x 18 pF
20 pF < 255
Ω 2 x 38 pF
30 pF < 140
Ω 2 x 58 pF
27 MHz
10 pF < 130
Ω 2 x 18 pF
20 pF < 50
Ω 38 pF; 18 pF
30 pF n.a. n.a.
osc_out
n.c.
osc_in
Cx2Cx1
on-chip
off-chip
(a) (b)
clock
xtm
clkout
pd
V
SSA
XO
V
DDA
V
SSA
V
DDA
mce560
xtmpd
XO
clkout
osc_outosc_in