Clock - Samsung S5PV210 Hardware Design Manual

S5PV210_HARDWARE DESING GUIDE REV 1.0

4.4. Clock

4.4.1. Input Clock
C
M A I N
C
M A I N
a ) X - T A L M a i n ( O M [ 0 ] = 0 )
C
H D M I
C
H D M I
c ) X - T A L H D M I
External capacitance used for X-tal
Feedback resistor between XTI with
for X-tal main,usb,hdmi
X X T I
R f e d
_
M A I N
X X T O
X H D M I X T I
R f e d
_ H D M I
X H D M I X T O
Figure 4-1) Input Clock Example
XTO
Crystal requirement
Crystal requirement
for X-tal rtc
C
U S B
R f e d
C
U S B
b ) X - T A L U S B ( O M [ 0 ] = 1 )
C
R T C
R f e d
C
R T C
d ) X - T A L R T C
C Depends on Crystal's load
MAIN
C Depends on Crystal's load
USB
C Depends on Crystal's load
HDMI
C Depends on Crystal's load
RTC
Rfed
_MAIN
Rfed
_USB
Rfed
_HDMI
Rfed
_RTC
ESR: 60ohm max.
Shunt capacitance: 7pF max.
Frequence Torelance: ±50ppm
Aging: ±5.0ppm/year max.
ESR: 80Kohm max.
Shunt capacitance: 2pF max.
Frequence Torelance: ±20ppm
X U S B X T I
_ U S B
X U S B X T O
X R T C X T I
_ R T C
X R T C X T O
capacitance(CL)
capacitance(CL)
capacitance(CL)
capacitance(CL)
5M Ohm
5M Ohm
5M Ohm
10M Ohm
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