Datasheet
2009-2016 Microchip Technology Inc. DS60001156J-page 343
PIC32MX5XX/6XX/7XX
29.2 On-Chip Voltage Regulator
All PIC32MX5XX/6XX/7XX devices’ core and digital
logic are designed to operate at a nominal 1.8V. To
simplify system designs, most devices in the PIC32MX-
5XX/6XX/7XX family incorporate an on-chip regulator
providing the required core logic voltage from V
DD
.
A low-ESR capacitor (such as tantalum) must be
connected to the V
CAP
pin (see Figure 29-1). This
helps to maintain the stability of the regulator. The
recommended value for the filter capacitor is provided
in Section 32.1 “DC Characteristics”.
29.2.1 ON-CHIP REGULATOR AND POR
It takes a fixed delay for the on-chip regulator to generate
an output. During this time, designated as T
PU
, code
execution is disabled. T
PU
is applied every time the
device resumes operation after any power-down,
including Sleep mode.
29.2.2 ON-CHIP REGULATOR AND BOR
PIC32MX5XX/6XX/7XX devices also have a simple
brown-out capability. If the voltage supplied to the
regulator is inadequate to maintain a regulated level,
the regulator Reset circuitry will generate a Brown-out
Reset (BOR). This event is captured by the BOR flag
bit (RCON<1>). The brown-out voltage levels are
specified in Section 32.1 “DC Characteristics”.
FIGURE 29-1: CONNECTIONS FOR THE
ON-CHIP REGULATOR
29.3 Programming and Diagnostics
PIC32MX5XX/6XX/7XX devices provide a complete
range of programming and diagnostic features that can
increase the flexibility of any application using them.
These features allow system designers to include:
• Simplified field programmability using two-wire
In-Circuit Serial Programming™ (ICSP™)
interfaces
• Debugging using ICSP
• Programming and debugging capabilities using
the EJTAG extension of JTAG
• JTAG boundary scan testing for device and board
diagnostics
PIC32 devices incorporate two programming and diag-
nostic modules, and a trace controller, that provide a
range of functions to the application developer.
FIGURE 29-2: PROGRAMMING,
DEBUGGING, AND TRACE
PORTS BLOCK DIAGRAM
Note: It is important that the low-ESR capacitor
is placed as close as possible to the V
CAP
pin.
V
DD
V
CAP
V
SS
PIC32
C
EFC
(2)
3.3V
(1)
Note 1: These are typical operating voltages. Refer to
Section 32.1 “DC Characteristics”
for the full
operating ranges of V
DD
.
2:
It is important that the low-ESR capacitor is
placed as close as possible to the V
CAP
pin.
(10 F typical)
TDI
TDO
TCK
TMS
JTAG
Controller
ICSP™
Controller
Core
JTAGEN DEBUG<1:0>
Instruction Trace
Controller
DEBUG<1:0>
ICESEL
PGEC1
PGED1
PGEC2
PGED2
TRCLK
TRD0
TRD1
TRD2
TRD3
Note 1:
Trace is not available on 64-pin devices.
(see
Note 1
)