PIC16LF18854 Datasheet, PDF (156/668 Pages) Microchip Technology – C Compiler Optimized RISC Architecture

PIC16(L)F18856/76
8.2.3.2 Peripheral Usage in Sleep
Some peripherals that can operate in Sleep mode will
not operate properly with the Low-Power Sleep mode
selected. The Low-Power Sleep mode is intended for
use with these peripherals:
• Brown-out Reset (BOR)
• Watchdog Timer (WDT)
• External interrupt pin/interrupt-on-change pins
• Timer1 (with external clock source)
It is the responsibility of the end user to determine what
is acceptable for their application when setting the
VREGPM settings in order to ensure operation in
Sleep.
Note:
The PIC16LF18855/75 does not have a
configurable Low-Power Sleep mode.
PIC16LF18855/75 is an unregulated
device and is always in the lowest power
state when in Sleep, with no wake-up time
penalty. This device has a lower maximum
VDD and I/O voltage than the
PIC16F18855/75. See Section 37.0
“Electrical Specifications” for more
information.
8.2.4 IDLE MODE
When the Idle Enable (IDLEN) bit is clear (IDLEN = 0),
the SLEEP instruction will put the device into full Sleep
mode (see Section 8.2 “Sleep Mode”). When IDLEN
is set (IDLEN = 1), the SLEEP instruction will put the
device into IDLE mode. In IDLE mode, the CPU and
memory operations are halted, but the peripheral
clocks continue to run. This mode is similar to DOZE
mode, except that in IDLE both the CPU and PFM are
shut off.
Note:
Peripherals using FOSC will continue
running while in Idle (but not in Sleep).
Peripherals
using
HFINTOSC,
LFINTOSC, or SOSC will continue
running in both Idle and Sleep.
Note:
If CLKOUT is enabled (CLKOUT = 0,
Configuration Word 1), the output will
continue operating while in Idle.
8.2.4.1 Idle and Interrupts
IDLE mode ends when an interrupt occurs (even if GIE
= 0), but IDLEN is not changed. The device can
re-enter IDLE by executing the SLEEP instruction.
If Recover-on-Interrupt is enabled (ROI = 1), the
interrupt that brings the device out of Idle also restores
full-speed CPU execution when doze is also enabled.
8.2.4.2 Idle and WDT
When in Idle, the WDT Reset is blocked and will
instead wake the device. The WDT wake-up is not an
interrupt, therefore ROI does not apply.
Note:
The WDT can bring the device out of Idle,
in the same way it brings the device out of
Sleep. The DOZEN bit is not affected.
DS40001824A-page 156
Preliminary
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