Os motores de busca de Datasheet de Componentes eletrônicos
  Portuguese  ▼
ALLDATASHEETPT.COM

X  

Preview PDF HTML

SPEAR320S-2 Folha de dados(PDF) 72 Page - STMicroelectronics

Nome de Peças SPEAR320S-2
Descrição Electrónicos  Embedded MPU with ARM926 core for industrial and consumer applications
PDF  113 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SPEAR320S-2 Folha de dados(HTML) 72 Page - STMicroelectronics

Back Button SPEAR320S-2 Datasheet HTML 68Page - STMicroelectronics SPEAR320S-2 Datasheet HTML 69Page - STMicroelectronics SPEAR320S-2 Datasheet HTML 70Page - STMicroelectronics SPEAR320S-2 Datasheet HTML 71Page - STMicroelectronics SPEAR320S-2 Datasheet HTML 72Page - STMicroelectronics SPEAR320S-2 Datasheet HTML 73Page - STMicroelectronics SPEAR320S-2 Datasheet HTML 74Page - STMicroelectronics SPEAR320S-2 Datasheet HTML 75Page - STMicroelectronics SPEAR320S-2 Datasheet HTML 76Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 72 / 113 page
background image
Electrical characteristics
SPEAr320S
72/113
Doc ID 022508 Rev 2
4.6.2
Real-time clock (RTC)
RTC clock generated from a crystal oscillator
Figure 5.
RTC crystal connection
1.
CL1 and CL2 are the load capacitors.
The value of the capacitors depends on the type of the selected crystal. To calculate the
value of the load capacitance, use the formula given below.
Formula
C
L
C
L1
C
L2
×
C
L1
C
L2
+
--------------------------
C
s
+
=
Where CL1 and CL2 are the load capacitors and CS is the circuit stray capacitance.
In our application:
CL1 = CL2 = Cext
This implies:
Cext = (CL-CS)*2
Table 42.
RTC oscillator characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Unit
fOSC_IN
Oscillator frequency
32.768
kHz
ESR
Equivalent series
resistance
6000
Ω
gm
Oscillator
transconductance
Startup
5
µA/V
tSU
Startup time
Stabilized power
on RTC_VDD1V5
pin
17000
fOSC_IN
cycles
GND
32.768 kHz
CL1
CL2
(1)
(1)
RTC_XI
RTC_XO



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100  ...More


Folha de dados Download

Go To PDF Page


Ligação URL



ALLDATASHEET é útil para você?  [ DONATE ] 

Sobre Alldatasheet   |   Publicidade   |   Contato conosco   |   Privacy Policy   |   Link para a ficha técnica    |   roca de Link   |   Lista de Fabricantes
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com