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.
Index ( − ) | Capacitor |
(A long pin is plus polarity.) |
It is cautious of the polarity of a capacitor!
16V 10
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
Capacitor mounting socket name | Correspondence | Evaluation MCU pin | |
signal line | number | ||
| |||
|
|
| |
SC4, 5 | PF2 | 127 | |
|
|
| |
SC6, 7 | PD3 | 241 | |
|
|
| |
SC8, 9 | P85 | 36 | |
|
|
| |
SC10, 11 | P65 | 39 | |
|
|
|
24