at85c51snd3b ATMEL Corporation, at85c51snd3b Datasheet - Page 243

• Manufacturer Part Number: at85c51snd3b
• Description: Single-chip Digital Audio Decoder - Encoder With Usb 2.0 Interface
• Manufacturer: ATMEL Corporation

Oscillator & Crystal
Schematic
Parameters
DC to DC Convertor
Schematic
7632C–MP3–11/06
Figure 134. Crystal Connection
Note:
Table 264. Oscillator & Crystal Characteristics
V
Notes:
Figure 135. Battery DC-DC Connection
Notes:
DD
Symbol
C
C
DL
RS
CS
= 1.65 to 3.6 V; T
C
F
X1
X2
L
For operation with most standard crystals, no external components are needed on X1
and X2. It may be necessary to add external capacitors on X1 and X2 to ground in spe-
cial cases (max 10 pF).
1. Authorized crystal frequencies are 12, 16, 20 and 24 MHz
2. Authorised input frequencies are 12, 13, 16, 19.2, 19.5, 20, 24 and 26MHz
1. Mandatory connection if DC-DC is used.
2. Depending on power supply scheme, C
136
Parameter
Internal Capacitance (X1 - VSS)
Internal Capacitance (X2 - VSS)
Equivalent Load Capacitance (X1 - X2)
Drive Level
Crystal Frequency
Crystal Series Resistance
Crystal Shunt Capacitance
).
A
= -40 to +85° C
APVSS
(1)
L
DC
BVDD
DCLI
BVSS
C1
C2
Q
DC1
X1
X2
may replace C
RLVDD
Min
12
CVSS
LVDD
AT85C51SND3B
VSS
Typ
10
10
5
LV
capacitor (see Figure
(1)
C
DC1
(2)
Max
50
24
40
6
C
DC2
MHz
Unit
µ W
pF
pF
pF
pF
Ω
243