DEMOBOARD-U3600BM Atmel, DEMOBOARD-U3600BM Datasheet - Page 17

• Manufacturer Part Number: DEMOBOARD-U3600BM
• Description: BOARD DEMO FOR U3600BM
• Manufacturer: Atmel
• Type: Cordless Phone ICr

Specifications of DEMOBOARD-U3600BM

• Contents: Board, Software and Documentation
• For Use With/related Products: U3600BM
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

DACOvalue1
DACOvalue2
DACOvalue3
DACOvalue4
DACOvalue5
25%
50%
75%
Equivalent pulse-train
75%
50%
25%
DACOvalue1
DACOvalue2
DACOvalue3
DACOvalue4
DACOvalue5
DACO output jumps
randomly between
GND and VBAT
DACO output
fully HIGH
DACO output
fully LOW
high
low
DACOvalue1
DACOvalue2
DACOvalue3
DACOvalue4
DACOvalue5
127
63
0
DACO
output fully
HIGH
Pulse seen on scope due to noise
(but duty cycle is the same)
Y
DACO
output
jumps
randomly
between
GND and
VBAT
X
DACO output
fully LOW
high
low
These random pulses can be seen on the scope.
Due to noise, the duty cycle is not obviously
visible, but it is in reality as shown
on the left hand side. By using a filter
or digitally counting the high and low phases
with the aid of a microcontroller, the same
result as the "equivalent pulse train can be achieved“.
Using an R/C filter gives an equivalent
voltage value wich represents the duty cycle
counting with microcontroller gives the
equivalent time representing the duty cycle.
log UIN
and