PIC16F1823-I/SL Microchip Technology, PIC16F1823-I/SL Datasheet - Page 209
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PIC16F1823-I/SL
Manufacturer Part Number
PIC16F1823-I/SL
Description
3.5 KB Flash, 128 Bytes RAM, 32 MHz Int. Osc, 12 I/0, Enhanced Mid Range Core 14
Manufacturer
Microchip Technology
Series
PIC® XLP™ 16Fr
Datasheets
1.PIC16F722-ISS.pdf
(8 pages)
2.PIC12F1822T-ISN.pdf
(404 pages)
3.PIC12F1822T-ISN.pdf
(10 pages)
Specifications of PIC16F1823-I/SL
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
12
Program Memory Size
3.5KB (2K x 14)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Core
PIC
Processor Series
PIC16F
Data Bus Width
8 bit
Maximum Clock Frequency
32 MHz
Data Ram Size
128 B
On-chip Adc
Yes
Number Of Programmable I/os
12
Number Of Timers
3
Operating Supply Voltage
2.3 V to 5.5 V
Operating Temperature Range
- 40 C to + 85 C
A/d Bit Size
10 bit
A/d Channels Available
8
Height
1.25 mm
Interface Type
I2C, SPI, USART
Length
8.65 mm
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.3 V
Width
3.9 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F1823-I/SL
Manufacturer:
MICROCHIP
Quantity:
30 000
Part Number:
PIC16F1823-I/SL
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
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24.3.2
The following steps should be taken when configuring
the CCP1 module for standard PWM operation:
1.
2.
3.
4.
5.
6.
24.3.3
The PWM period is specified by the PR2 register of
Timer2. The PWM period can be calculated using the
formula of
EQUATION 24-1:
2010 Microchip Technology Inc.
Note:
Disable the CCP1 pin output driver by setting
the associated TRIS bit.
Load the PR2 register with the PWM period
value.
Configure the CCP1 module for the PWM mode
by loading the CCP1CON register with the
appropriate values.
Load the CCPR1L register and the DC1B1 bits
of the CCP1CON register, with the PWM duty
cycle value.
Configure and start Timer2:
• Clear the TMR2IF interrupt flag bit of the
• Configure the T2CKPS bits of the T2CON
• Enable the Timer by setting the TMR2ON
Enable PWM output pin:
• Wait until the Timer overflows and the
• Enable the CCP1 pin output driver by clear-
Note 1:
PWM Period
PIR1 register. See Note below.
register with the Timer prescale value.
bit of the T2CON register.
TMR2IF bit of the PIR1 register is set. See
Note below.
ing the associated TRIS bit.
Equation
SETUP FOR PWM OPERATION
In order to send a complete duty cycle and
period on the first PWM output, the above
steps must be included in the setup
sequence. If it is not critical to start with a
complete PWM signal on the first output,
then step 6 may be ignored.
PWM PERIOD
T
OSC
=
24-1.
(TMR2 Prescale Value)
PWM PERIOD
= 1/F
PR2
OSC
+
1
4 T
PIC12F/LF1822/PIC16F/LF1823
OSC
Preliminary
When TMR2 is equal to PR2, the following three events
occur on the next increment cycle:
• TMR2 is cleared
• The CCP1 pin is set. (Exception: If the PWM duty
• The PWM duty cycle is latched from CCPR1L into
24.3.4
The PWM duty cycle is specified by writing a 10-bit
value to multiple registers: CCPR1L register and
DC1B<1:0> bits of the CCP1CON register. The
CCPR1L contains the eight MSbs and the DC1B<1:0>
bits of the CCP1CON register contain the two LSbs.
CCPR1L and DC1B<1:0> bits of the CCP1CON
register can be written to at any time. The duty cycle
value is not latched into CCPR1H until after the period
completes (i.e., a match between PR2 and TMR2
registers occurs). While using the PWM, the CCPR1H
register is read-only.
Equation 24-2
width.
Equation 24-3
ratio.
EQUATION 24-2:
EQUATION 24-3:
The CCPR1H register and a 2-bit internal latch are
used to double buffer the PWM duty cycle. This double
buffering is essential for glitchless PWM operation.
The 8-bit timer TMR2 register is concatenated with
either the 2-bit internal system clock (F
the prescaler, to create the 10-bit time base. The system
clock is used if the Timer2 prescaler is set to 1:1.
When the 10-bit time base matches the CCPR1H and
2-bit latch, then the CCP1 pin is cleared (see
Figure
cycle = 0%, the pin will not be set.)
CCPR1H.
Note:
Duty Cycle Ratio
Pulse Width
24-4).
The Timer postscaler (see
“Timer2
determination of the PWM frequency.
PWM DUTY CYCLE
is used to calculate the PWM duty cycle
is used to calculate the PWM pulse
=
T
=
CCPR1L:CCP1CON<5:4>
OSC
Operation”) is not used in the
PULSE WIDTH
DUTY CYCLE RATIO
---------------------------------------------------------------------- -
CCPRxL:CCPxCON<5:4>
(TMR2 Prescale Value)
4 PRx
DS41413B-page 209
+
OSC
1
Section 22.1
), or 2 bits of
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