PIC16LF1847T-I/MV Microchip Technology, PIC16LF1847T-I/MV Datasheet - Page 222
![14 KB Flash, 1K Bytes RAM, 32 MHz Int. Osc, 16 I/0, Enhanced Mid Range Core, Nan](/photos/16/12/161255/qfn28_sml.jpg)
PIC16LF1847T-I/MV
Manufacturer Part Number
PIC16LF1847T-I/MV
Description
14 KB Flash, 1K Bytes RAM, 32 MHz Int. Osc, 16 I/0, Enhanced Mid Range Core, Nan
Manufacturer
Microchip Technology
Series
PIC® XLP™ mTouch™ 16Fr
Datasheet
1.PIC16F1847-EP.pdf
(408 pages)
Specifications of PIC16LF1847T-I/MV
Processor Series
PIC16LF
Core
RISC
Data Bus Width
10 bit
Program Memory Type
Flash
Program Memory Size
8 KB
Data Ram Size
1024 B
Interface Type
SPI, I2C
Maximum Clock Frequency
32 KHZ
Number Of Programmable I/os
15
Number Of Timers
3
Operating Supply Voltage
3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
UQFN-28
Operating Temperature Range
- 40 C to + 85 C
Processor To Be Evaluated
PIC16F1847T
Supply Current (max)
34 uA
Core Processor
PIC
Core Size
8-Bit
Speed
32MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
15
Eeprom Size
256 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Lead Free Status / Rohs Status
Details
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- Download datasheet (4Mb)
PIC16(L)F1847
24.4.3
The PWM mode supports an Auto-Shutdown mode that
will disable the PWM outputs when an external
shutdown event occurs. Auto-Shutdown mode places
the PWM output pins into a predetermined state. This
mode is used to help prevent the PWM from damaging
the application.
The auto-shutdown sources are selected using the
CCPxAS<2:0> bits of the CCPxAS register. A shutdown
event may be generated by:
• A logic ‘0’ on the INT pin
• A logic ‘1’ on a Comparator (Cx) output
A shutdown condition is indicated by the CCPxASE
(Auto-Shutdown Event Status) bit of the CCPxAS
register. If the bit is a ‘0’, the PWM pins are operating
normally. If the bit is a ‘1’, the PWM outputs are in the
shutdown state.
When a shutdown event occurs, two things happen:
The CCPxASE bit is set to ‘1’. The CCPxASE will
remain set until cleared in firmware or an auto-restart
occurs (see
The enabled PWM pins are asynchronously placed in
their shutdown states. The PWM output pins are
grouped into pairs [PxA/PxC] and [PxB/PxD]. The state
of each pin pair is determined by the PSSxAC and
PSSxBD bits of the CCPxAS register. Each pin pair may
be placed into one of three states:
• Drive logic ‘1’
• Drive logic ‘0’
• Tri-state (high-impedance)
FIGURE 24-14:
DS41453B-page 222
Shutdown
PWM
CCPxASE bit
ENHANCED PWM
AUTO-SHUTDOWN MODE
Section 24.4.4 “Auto-Restart
Activity
Event
PWM AUTO-SHUTDOWN WITH FIRMWARE RESTART (PXRSEN = 0)
Overflow
Timer
Start of
PWM Period
PWM Period
(Auto-Shutdown)
Mode”).
Event Occurs
Missing Pulse
Overflow
Shutdown
Timer
Preliminary
Event Clears
Overflow
Shutdown
Timer
Note 1: The
2: Writing to the CCPxASE bit of the
3: Once the auto-shutdown condition has
4: Prior to an auto-shutdown event caused
Missing Pulse
(CCPxASE not clear)
level-based signal, not an edge-based
signal. As long as the level is present, the
auto-shutdown will persist.
CCPxAS register is disabled while an
auto-shutdown condition persists.
been removed and the PWM restarted
(either through firmware or auto-restart)
the PWM signal will always restart at the
beginning of the next PWM period.
by a comparator output or INT pin event,
a software shutdown can be triggered in
firmware by setting the CCPxASE bit of
the
Auto-Restart feature tracks the active
status of a shutdown caused by a
comparator output or INT pin event only.
If it is enabled at this time, it will
immediately clear this bit and restart the
ECCP module at the beginning of the
next PWM period.
Overflow
Cleared by
CCPxASE
Firmware
Timer
CCPxAS
auto-shutdown
PWM
Resumes
2011 Microchip Technology Inc.
register
Overflow
condition
Timer
to
‘1’.
is
The
a
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