PIC18F65K90T-I/PT Microchip Technology, PIC18F65K90T-I/PT Datasheet - Page 442

• Manufacturer Part Number: PIC18F65K90T-I/PT
• Description: 32kB Flash, 2kB RAM, 1kB EE, NanoWatt XLP, LCD 64 TQFP 10x10x1mm T/R
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F65K90T-I/PT

• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 32 KB
• Data Ram Size: 2 KB
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 64 MHz
• Number Of Timers: 8
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 125 C
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 16 Channel
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 64MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 16x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP
• Lead Free Status / Rohs Status: Details

PIC18F87K90 FAMILY
28.3
All of the PIC18F87K90 family devices power their core
digital logic at a nominal 3.3V. For designs that are
required to operate at a higher typical voltage, such as
5V, all family devices incorporate two on-chip regula-
tors that allow the device to run its core logic from V
Those regulators are:
• Normal On-Chip Regulator
• Ultra Low-Power, On-Chip Regulator
The hardware configuration of these regulators is the
same and is explained in
Enable/disable by Hardware”
differences relate to when the device enters Sleep, as
explained in
28.3.1
The regulator can be enabled or disabled only by
hardware. The regulator is controlled by the ENVREG
pin and the V
28.3.1.1
Tying V
provides power to the core from the other V
When the regulator is enabled, a low-ESR filter capac-
itor must be connected to the V
Figure
stability. The recommended value for the filter capacitor
is given in
28.3.1.2
If ENVREG is tied to V
this case, a 0.1  F capacitor should be connected to
the V
When the regulator is being used, the overall voltage
budget is very tight. The regulator should operate the
device down to 1.8V. When V
regulator no longer regulates, but the output voltage fol-
lows the input until V
the output of the regulator output may drop to 0V.
DS39957D-page 442
DDCORE
28-2). This helps maintain the regulator’s
DD
On-Chip Voltage Regulator
to the pin enables the regulator, which in turn,
Section 31.2
REGULATOR ENABLE/DISABLE BY
HARDWARE
Section 28.3.2
/V
DDCORE
Regulator Enable Mode
Regulator Disable Mode
CAP
pin (see
DD
/V
reaches 1.8V. Below this voltage,
SS
CAP
DC Characteristics .
, the regulator is disabled. In
Section 28.3.1 “Regulator
pin.
.
Figure
DD
DDCORE
. The regulators’ only
drops below 3.3V, the
28-2).
/V
CAP
DD
pins.
pin (see
DD
.
FIGURE 28-2:
Note 1:
Regulator Enabled (ENVREG tied to V
Regulator Disabled (ENVREG tied to V
C
0.1  F
These are typical operating voltages. For the
full operating ranges of V
see
F
5V
3.3V
Section 31.2
 2009-2011 Microchip Technology Inc.
(1)
CONNECTIONS FOR THE
ON-CHIP REGULATOR
V
ENVREG
V
V
DD
DDCORE
SS
PIC18F87K90
V
ENVREG
V
V
DD
DDCORE
SS
PIC18F87K90
“DC Characteristics” .
/V
CAP
/V
DD
CAP
and V
DD
SS
DDCORE
):
):
,