Installing A Bypass Capacitor For Dvcc - Fujitsu PGA-401P Operation Manual

Chapter 4 Connections

4.5 Installing a Bypass Capacitor for DVCC

If the evaluation MCU has an integrated digital power supply ( DVCC pin), a bypass capacitor can be mounted
on the digital power supply as required.When it does not have a digital power supply (DVCC pin) in Evaluation
MCU, a bypass capacitor does not need to be mounted.
Installing a Bypass Capacitor
To use a polarized capacitor such as an electrolytic capacitor as the bypass capacitor, install it ac-
cording to the polarity defined by the silk pattern on the PC board. Use meticulous care to check the
polarity.
Select the appropriate capacitor so that its type, capacitance, and withstand voltage are best suited
for the operating environment.
Figure 4-5-1 shows how to install the capacitor. Table 4.5-1 lists the signal names of digital power
supply pins of the evaluation MCU plugged in each capacitor mounting socket.
It is cautious of
the polarity of a
capacitor!
Table 4.5-1 The Signal Names of Digital Power Supply Pins of the Evaluation MCU
Capacitor mounting socket name
SC4, 5
SC6, 7
SC8, 9
SC10, 11
24
All manuals and user guides at all-guides.com
Index ( − )
Figure 4.5-1 Mounting the Capacitor
(A long pin is plus polarity.)
Capacitor mounting socket
− +
Correspondence Evaluation MCU pin
signal line
PF2
PD3
P85
P65
Capacitor
number
127
241
36
39