PIC18LF14K22-E/P Microchip Technology, PIC18LF14K22-E/P Datasheet - Page 233
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PIC18LF14K22-E/P
Manufacturer Part Number
PIC18LF14K22-E/P
Description
16KB Flash, 512bytes RAM, 256bytes EEPROM, 16MIPS, NanoWatt XLP 20 PDIP .300in T
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheet
1.PIC18LF13K22-ISS.pdf
(388 pages)
Specifications of PIC18LF14K22-E/P
Core Processor
PIC
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
17
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
20-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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18.0
PIC18F1XK22/LF1XK22 devices offer a total of seven
operating modes for more efficient power manage-
ment. These modes provide a variety of options for
selective power conservation in applications where
resources may be limited (i.e., battery-powered
devices).
There are three categories of power-managed modes:
• Run modes
• Idle modes
• Sleep mode
These categories define which portions of the device
are clocked and sometimes, what speed. The Run and
Idle modes may use any of the three available clock
sources (primary, secondary or internal oscillator
block); the Sleep mode does not use a clock source.
The power-managed modes include several power-
saving features offered on previous PIC
devices. One is the clock switching feature which allows
the controller to use the Timer1 oscillator in place of the
primary oscillator. Also included is the Sleep mode,
offered by all PIC
device clocks are stopped.
18.1
Selecting a power-managed mode requires two
decisions:
• Whether or not the CPU is to be clocked
• The selection of a clock source
TABLE 18-1:
2010 Microchip Technology Inc.
Sleep
PRI_RUN
SEC_RUN
RC_RUN
PRI_IDLE
SEC_IDLE
RC_IDLE
Note 1:
Mode
2:
POWER-MANAGED MODES
Selecting Power-Managed Modes
IDLEN reflects its value when the SLEEP instruction is executed.
Includes HFINTOSC and HFINTOSC postscaler, as well as the LFINTOSC source.
IDLEN
POWER-MANAGED MODES
N/A
N/A
N/A
®
0
1
1
1
OSCCON Bits
microcontroller devices, where all
(1)
SCS<1:0>
N/A
00
01
1x
00
01
1x
®
microcontroller
Clocked
Clocked
Clocked
CPU
Module Clocking
Off
Off
Off
Off
Preliminary
Peripherals
Clocked
Clocked
Clocked
Clocked
Clocked
Clocked
PIC18F1XK22/LF1XK22
Off
The IDLEN bit of the OSCCON register controls CPU
clocking, while the SCS<1:0> bits of the OSCCON
register select the clock source. The individual modes,
bit settings, clock sources and affected modules are
summarized in Table 18-1.
18.1.1
The SCS<1:0> bits allow the selection of one of three
clock sources for power-managed modes. They are:
• the primary clock, as defined by the FOSC<3:0>
• the secondary clock (the Timer1 oscillator)
• the internal oscillator block
18.1.2
Switching from one power-managed mode to another
begins by loading the OSCCON register. The
SCS<1:0> bits select the clock source and determine
which Run or Idle mode is to be used. Changing these
bits causes an immediate switch to the new clock
source, assuming that it is running. The switch may
also be subject to clock transition delays. Refer to
Section 2.9 “Clock Switching” for more information.
Entry to the power-managed Idle or Sleep modes is
triggered by the execution of a SLEEP instruction. The
actual mode that results depends on the status of the
IDLEN bit of the OSCCON register.
Depending on the current mode and the mode being
switched to, a change to a power-managed mode does
not always require setting all of these bits. Many
transitions may be done by changing the oscillator select
bits, or changing the IDLEN bit, prior to issuing a SLEEP
instruction. If the IDLEN bit is already configured
correctly, it may only be necessary to perform a SLEEP
instruction to switch to the desired mode.
Configuration bits
None – All clocks are disabled
Primary – LP, XT, HS, RC, EC and Internal
Oscillator Block
This is the normal full power execution mode.
Secondary – Timer1 Oscillator
Internal Oscillator Block
Primary – LP, XT, HS, HSPLL, RC, EC
Secondary – Timer1 Oscillator
Internal Oscillator Block
Available Clock and Oscillator Source
CLOCK SOURCES
ENTERING POWER-MANAGED
MODES
(2)
.
(2)
(2)
DS41365D-page 233
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