PIC18F27J53T-I/SO Microchip Technology, PIC18F27J53T-I/SO Datasheet - Page 453

• Manufacturer Part Number: PIC18F27J53T-I/SO
• Description: 28-pin, USB, 128KB Flash, 4KB RAM, 12 MIPS, 12-bit ADC, NanoWatt XLP 28 SOIC .30
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F27J53T-I/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, LIN, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 2.15 V ~ 3.6 V
• Data Converters: A/D 10x10b/12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3.8 KB
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 8
• Operating Supply Voltage: 2.15 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

28.3
The digital core logic of the PIC18F47J53 family
devices is designed on an advanced manufacturing
process, which requires 2.0V to 2.7V. The digital core
logic obtains power from the V
supply pin.
However, in many applications it may be inconvenient
to run the I/O pins at the same core logic voltage, as it
would restrict the ability of the device to interface with
other, higher voltage devices, such as those run at a
nominal 3.3V. Therefore, all PIC18F47J53 family
devices implement a dual power supply rail topology.
The core logic obtains power from the V
pin, while the general purpose I/O pins obtain power
from the V
supplied with a voltage between 2.15V to 3.6V (“F”
device) or 2.0V to 3.6V (“LF” device).
This dual supply topology allows the microcontroller to
interface with standard 3.3V logic devices, while
running the core logic at a lower voltage of nominally
2.5V.
In order to make the microcontroller more convenient to
use, an integrated 2.5V low dropout, low quiescent
current linear regulator has been integrated on the die
inside PIC18F47J53 family devices. This regulator is
designed specifically to supply the core logic of the
device. It allows PIC18F47J53 family devices to
effectively run from a single power supply rail, without
the need for external regulators.
The on-chip voltage regulator is always enabled on “F”
devices. The V
as the regulator output pin and the core logic supply
power input pin. A capacitor should be connected to the
V
lator stability. For example connections for PIC18F and
PIC18LF devices, see Figure 28-2.
On “LF” devices, the on-chip regulator is always
disabled. This allows the device to save a small amount
of quiescent current consumption, which may be
advantageous in some types of applications, such as
those which will entirely be running at a nominal 2.5V.
On “LF” devices, the V
the core logic power supply input pin, and therefore,
must be connected to a 2.0V to 2.7V supply rail at the
application circuit board level. On these devices, the
 2010 Microchip Technology Inc.
DDCORE
Note 1: The on-chip voltage regulator is only
2: The V
On-Chip Voltage Regulator
/V
DD
CAP
available in parts designated with an “F”,
such as PIC18F26J53. The on-chip
regulator is disabled on devices with “LF”
in their part number.
floating. On “F” devices, it must be con-
nected to a capacitor, of size C
ground. On “LF” devices, V
must be connected to a power supply
source between 2.0V and 2.7V.
pin of the microcontroller, which may be
DDCORE
pin to ground and is necessary for regu-
DDCORE
/V
DDCORE
CAP
/V
CAP
pin simultaneously serves
/V
pin must never be left
CAP
DDCORE
pin still serves as
DDCORE
DDCORE
/V
CAP
EFC
/V
power
/V
, to
CAP
CAP
Preliminary
PIC18F47J53 FAMILY
I/O pins may still optionally be supplied with a voltage
between 2.0V to 3.6V, provided that V
greater than, or equal to, V
connections for PIC18F and PIC18LF devices, see
Figure 28-2.
The specifications for core voltage and capacitance are
listed
PIC18F47J53 Family (Industrial)”.
28.3.1
On “F” devices, the on-chip regulator provides a con-
stant voltage of 2.5V nominal to the digital core logic.
The regulator can provide this level from a V
2.5V, all the way up to the device’s V
have the capability to boost V
When the V
regulate 2.5V, the regulator enters Tracking mode. In
Tracking mode, the regulator output follows V
typical voltage drop of 100 mV or less.
The on-chip regulator includes a simple Low-Voltage
Detect (LVD) circuit. This circuit is separate and
independent of the High/Low-Voltage Detect (HLVD)
module described in Section 26.0 “High/Low Voltage
Detect (HLVD)”. The on-chip regulator LVD circuit con-
tinuously monitors the V
updates the LVDSTAT bit in the WDTCON register. The
LVD detect threshold is set slightly below the normal
regulation set point of the on-chip regulator.
Application firmware may optionally poll the LVDSTAT
bit to determine when it is safe to run at maximum rated
frequency, so as not to inadvertently violate the voltage
versus
Figure 31-1.
The V
when the on-chip regulator is enabled. On “LF”
devices, the Analog-to-Digital Converter and the HLVD
module can still be used to provide firmware with V
and V
Note:
DDCORE
DDCORE
in
frequency
In parts designated with an “LF”, such as
PIC18LF47J53, V
exceed V
VOLTAGE REGULATOR TRACKING
MODE AND LOW-VOLTAGE
DETECTION
DD
Section 31.3
voltage level information.
monitoring LVD circuit is only active
supply input voltage drops too low to
DD
requirements
.
DDCORE
DDCORE
“DC
DDCORE
DD
/V
DS39964B-page 453
levels below 2.5V.
voltage level and
DDMAX
CAP
Characteristics:
provided
. For example
DD
must never
. It does not
DD
is always
DD
of about
, with a
DD
by