PIC16F1937-I/P Microchip Technology, PIC16F1937-I/P Datasheet - Page 193

• Manufacturer Part Number: PIC16F1937-I/P
• Description: IC PIC MCU FLASH 512KX14 40-PDIP
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1937-I/P

• Program Memory Type: FLASH
• Program Memory Size: 14KB (8K x 14)
• Package / Case: 40-DIP (0.600", 15.24mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 32MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 36
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: EUSART/MI2C/SPI
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 36
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 14-ch x 10-bit
• A/d Bit Size: 10 bit
• A/d Channels Available: 14
• Height: 4.95 mm
• Length: 53.21 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Width: 14.73 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

19.5
The PWM mode generates a Pulse-Width Modulated
signal on the CCPx pin. The duty cycle, period and
resolution are determined by the following registers:
• PRx
• TxCON
• CCPRxL
• CCPxCON
The ECCP modules have the following additional
registers:
• ECCPxAS
• PSTRxCON
• PWMxCON
In Pulse-Width Modulation (PWM) mode, the CCPx
module produces up to a 10-bit resolution PWM output
on the CCPx pin. Since the CCPx pin is multiplexed
with the PORT data latch, the TRIS for that pin must be
cleared to enable the CCPx pin output driver.
The CCPx module in PWM mode can have the PWM
based off of either Timer2, Timer4 or TImer6. This is
controlled by the CCPTMRS0 and CCPTMRS1
registers. Reference Section 19.2 “CCP Clock
Selection” for more information.
Figure 19-3 shows a simplified block diagram of PWM
operation.
Figure 19-4 shows a typical waveform of the PWM
signal.
For a step-by-step procedure on how to set up the CCP
module for PWM operation, see Section 19.5.7
“Setup for PWM Operation”.
© 2008 Microchip Technology Inc.
Note:
PWM Mode
Clearing the CCPxCON register will
relinquish CCPx control of the CCPx pin.
Preliminary
FIGURE 19-3:
The PWM output (Figure 19-4) has a time base
(period) and a time that the output stays high (duty
cycle).
FIGURE 19-4:
Note 1:
PIC16F193X/LF193X
CCPRxH
Duty Cycle Registers
Comparator
2:
Pulse Width
CCPRxL
TMRX = 0
PRx
TMRx
Comparator
The 8-bit timer TMR2 register is concatenated
with the 2-bit internal system clock (F
2 bits of the prescaler, to create the 10-bit time
base.
In PWM mode, CCPRxH is a read-only register.
(2)
Period
(Slave)
(1)
SIMPLIFIED PWM BLOCK
DIAGRAM
Clear Timerx,
toggle CCPx pin and
latch duty cycle
CCP PWM OUTPUT
TMRx\2 = CCPRxH:CCPxCON<5:4>
CCPxCON<5:4>
TMRx = PRx
S
R
DS41364A-page 191
Q
TRIS
OSC
CCPx
), or