MA240026 Microchip Technology, MA240026 Datasheet - Page 220

• Manufacturer Part Number: MA240026
• Description: Daughter Cards & OEM Boards PIC24FJ16MC102 Plug-In Module
• Manufacturer: Microchip Technology

Specifications of MA240026

• Rohs: yes
• Data Bus Width: 16 bit
• Description/function: PIC24F 28 Pin QFN to 100 Pin Plug-in-Module
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 3 V to 3.6 V

PIC24FJ16MC101/102
23.2
All of the PIC24FJ16MC101/102 devices power their
core digital logic at a nominal 2.5V. This can create a
conflict for designs that are required to operate at a
higher typical voltage, such as 3.3V. To simplify system
design, all devices in the PIC24FJ16MC101/102 family
incorporate an on-chip regulator that allows the device
to run its core logic from V
The regulator provides power to the core from the other
V
(less than 5 ohms) capacitor (such as tantalum or
ceramic) must be connected to the V
(Figure
regulator. The recommended value for the filter capac-
itor is provided in
“Electrical
On a POR
voltage regulator to generate an output voltage. During
this time, designated as T
disabled. T
resumes operation after any power-down.
FIGURE 23-1:
DS39997B-page 220
Note 1:
DD
Note:
pins. When the regulator is enabled, a low-ESR
Tantalum
2:
3:
23-1). This helps to maintain the stability of the
10 µF
C
On-Chip Voltage Regulator
EFC
,
STARTUP
it takes approximately 20 μs for the on-chip
These are typical operating voltages. Refer to
TABLE 26-13: “Internal Voltage Regulator
Specifications”
trical Characteristics”
ranges of V
It is important for low-ESR capacitors to be
placed as close as possible to the V
Typical V
V
Characteristics”.
It is important for low-ESR capacitors to
be placed as close as possible to the V
pin.
DDMIN
3.3V
Table 26-13
.
CAP
is applied every time the device
DD
CONNECTIONS FOR THE
ON-CHIP VOLTAGE
REGULATOR
V
V
V
pin voltage = 2.5V when V
and V
DD
CAP
SS
PIC24F
DD
STARTUP
located in
.
CAP
located in
for the full operating
.
, code execution is
Section 26.0 “Elec-
(1,2,3)
Section 26.0
CAP
CAP
DD
pin.
CAP
≥
Preliminary
pin
23.3
The Brown-out Reset (BOR) module is based on an
internal voltage reference circuit that monitors the reg-
ulated supply voltage V
BOR module is to generate a device Reset when a
brown-out condition occurs. Brown-out conditions are
generally caused by glitches on the AC mains (for
example, missing portions of the AC cycle waveform
due to bad power transmission lines, or voltage sags
due to excessive current draw when a large inductive
load is turned on).
A BOR generates a Reset pulse, which resets the
device. The BOR selects the clock source, based on
the device Configuration bit values (FNOSC<2:0> and
POSCMD<1:0>).
If an oscillator mode is selected, the BOR activates the
Oscillator Start-up Timer (OST). The system clock is
held until OST expires. If the PLL is used, the clock is
held until the LOCK bit (OSCCON<5>) is ‘1’.
Concurrently, the PWRT time-out (TPWRT) is applied
before the internal Reset is released. If TPWRT = 0 and
a crystal oscillator is being used, then a nominal delay
of TFSCM = 100 is applied. The total delay in this case
is TFSCM.
The BOR Status bit (RCON<1>) is set to indicate that a
BOR has occurred. The BOR circuit continues to oper-
ate while in Sleep or Idle modes and resets the device
should V
DD
BOR: Brown-out Reset
fall below the BOR threshold voltage.
CAP
© 2011 Microchip Technology Inc.
. The main purpose of the