Philips LPC213 Series User Manual page 19

Philips Semiconductors
Volume 1
Table 6:
Fundamental
oscillation frequency
F
5 MHz - 10 MHz
10 MHz - 15 MHz
15 MHz - 20 MHz
20 MHz - 25 MHz
25 MHz - 30 MHz
User manual
Recommended values for C
components parameters)
Crystal load
capacitance C
C
1 MHz - 5 MHz 10 pF
20 pF
30 pF
10 pF
20 pF
30 pF
10 pF
20 pF
30 pF
10 pF
20 pF
30 pF
10 pF
20 pF
30 pF
10 pF
20 pF
30 pF
True
True
MIN f = 10 MHz
OSC
MAX f = 25 MHz
OSC
(Figure 7, mode a and/or b)
Fig 8. F selection algorithm
OSC
Rev. 01 — 24 June 2005
Chapter 3: System Control Block
in oscillation mode (crystal and external
X1/X2
Maximum crystal
series resistance R
L
NA
NA
< 300 Ω
< 300 Ω
< 300 Ω
< 300 Ω
< 300 Ω
< 220 Ω
< 140 Ω
< 220 Ω
< 140 Ω
< 80 Ω
< 160 Ω
< 90 Ω
< 50 Ω
< 130 Ω
< 50 Ω
NA
f selection
OSC
On-chip PLL used
in application?
False
ISP used for initial
code download?
False
External crystal
oscillator used?
False
MIN f = 1 MHz
OSC
MAX f = 50 MHz
OSC
(Figure 7, mode a)
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
UM10120
External load
capacitors C ,
S X1 CX2
NA
NA
58 pF, 58 pF
18 pF, 18 pF
38 pF, 38 pF
58 pF, 58 pF
18 pF, 18 pF
38 pF, 38 pF
58 pF, 58 pF
18 pF, 18 pF
38 pF, 38 pF
58 pF, 58 pF
18 pF, 18 pF
38 pF, 38 pF
58 pF, 58 pF
18 pF, 18 pF
38 pF, 38 pF
NA
True
MIN f = 1 MHz
OSC
MAX f = 30 MHz
OSC
(Figure 7, mode b)
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