Fujitsu MB2198-130 Manual Do Utilizador
24
4.5 Installing a Bypass Capacitor for DVCC
■
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.
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.
Figure 4.5-1 Mounting the Capacitor
Table 4.5-1 The Signal Names of Digital Power Supply Pins of the Evaluation MCU
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.
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.
Capacitor mounting socket name
Correspondence
signal line
Evaluation MCU pin
number
SC4, 5
PF2
127
SC6, 7
PD3
241
SC8, 9
P85
36
SC10, 11
P65
39
+
−
16V
10
Index (
−
)
Capacitor
(A long pin is plus polarity.)
Capacitor mounting socket
It is cautious of
the polarity of a
capacitor!
the polarity of a
capacitor!
Chapter 4 Connections