PIC32MX210F016B-I/SO Microchip Technology, PIC32MX210F016B-I/SO Datasheet - Page 27

• Manufacturer Part Number: PIC32MX210F016B-I/SO
• Description: PIC32, 16KB Flash, 4KB RAM, 40 MHz, USB, CTMU, 4 DMA 28 SOIC .300in TUBE
• Manufacturer: Microchip Technology

2.0
2.1
Getting started with the PIC32MX1XX/2XX family of
32-bit Microcontrollers (MCUs) requires attention to a
minimal set of device pin connections before proceed-
ing with development. The following is a list of pin
names, which must always be connected:
• All V
• All AV
• V
• MCLR pin
• PGECx/PGEDx pins, used for In-Circuit Serial
• OSC1 and OSC2 pins, when external oscillator
The following pin may be required, as well:
2.2
The use of decoupling capacitors on power supply
pins, such as V
See
© 2011-2012 Microchip Technology Inc.
is not used
Programming (ICSP™) and debugging purposes
source is used
V
reference for the ADC module is implemented.
Note:
Note 1: This data sheet summarizes the features
REF
CAP
(see
(see
(see
Voltage Regulator (V
(see
(see
(see
Figure
DD
+/V
DD
pin
2: Some registers and associated bits
GUIDELINES FOR GETTING
STARTED WITH 32-BIT
MICROCONTROLLERS
Basic Connection Requirements
Decoupling Capacitors
Section 2.2 “Decoupling
Section 2.2 “Decoupling
Section 2.4 “Master Clear (MCLR)
Section 2.5 “ICSP
Section 2.7 “External Oscillator
and V
REF
Section 2.3 “Capacitor on Internal
and AV
2-1.
The AV
connected, regardless of ADC use and
the ADC voltage reference source.
of the PIC32MX1XX/2XX family of
devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to the related section of the
“PIC32 Family Reference Manual”, which
is available from the Microchip web site
(www.microchip.com/PIC32).
described in this section may not be
available on all devices. Refer to
Section 4.0 “Memory Organization”
this data sheet for device-specific register
and bit information.
- pins, used when external voltage
SS
DD
SS
, V
pins
DD
pins, even if the ADC module
SS
, AV
and AV
CAP
DD
Pins”)
)”)
and AV
SS
Capacitors”)
Capacitors”)
pins must be
SS
is required.
Pins”)
Pin”)
Preliminary
in
Consider the following criteria when using decoupling
capacitors:
• Value and type of capacitor: A value of 0.1 µF
• Placement on the printed circuit board: The
• Handling high frequency noise: If the board is
• Maximizing performance: On the board layout
FIGURE 2-1:
(100 nF), 10-20V is recommended. The capacitor
should be a low Equivalent Series Resistance (low-
ESR) capacitor and have resonance frequency in
the range of 20 MHz and higher. It is further
recommended that ceramic capacitors be used.
decoupling capacitors should be placed as close to
the pins as possible. It is recommended that the
capacitors be placed on the same side of the board
as the device. If space is constricted, the capacitor
can be placed on another layer on the PCB using a
via; however, ensure that the trace length from the
pin to the capacitor is within one-quarter inch
(6 mm) in length.
experiencing high frequency noise, upward of tens
of MHz, add a second ceramic-type capacitor in par-
allel to the above described decoupling capacitor.
The value of the second capacitor can be in the
range of 0.01 µF to 0.001 µF. Place this second
capacitor next to the primary decoupling capacitor.
In high-speed circuit designs, consider implement-
ing a decade pair of capacitances as close to the
power and ground pins as possible. For example,
0.1 µF in parallel with 0.001 µF.
from the power supply circuit, run the power and
return traces to the decoupling capacitors first, and
then to the device pins. This ensures that the decou-
pling capacitors are first in the power chain. Equally
important is to keep the trace length between the
capacitor and the power pins to a minimum thereby
reducing PCB track inductance.
V
0.1 µF
Ceramic
C
DD
BP
Note 1: If the USB module is not used, this pin
R
C
R1
PIC32MX1XX/2XX
10Ω
must be connected to V
MCLR
V
V
SS
DD
RECOMMENDED
MINIMUM CONNECTION
C
PIC32
EFC
0.1 µF
Ceramic
C
BP
V
USB 3 V 3
DS61168D-page 27
DD
.
V
V
(1)
DD
0.1 µF
Ceramic
C
SS
0.1 µF
Ceramic
C
BP
BP
0.1 µF
Ceramic
C
BP