PIC16F628-04I/SO Microchip Technology, PIC16F628-04I/SO Datasheet - Page 66
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PIC16F628-04I/SO
Manufacturer Part Number
PIC16F628-04I/SO
Description
IC MCU FLASH 2KX14 COMP 18SOIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheet
1.PIC16F627-04P.pdf
(170 pages)
Specifications of PIC16F628-04I/SO
Program Memory Type
FLASH
Program Memory Size
3.5KB (2K x 14)
Package / Case
18-SOIC (7.5mm Width)
Core Processor
PIC
Core Size
8-Bit
Speed
4MHz
Connectivity
UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Eeprom Size
128 x 8
Ram Size
224 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
224 B
Interface Type
SCI/USART
Maximum Clock Frequency
4 MHz
Number Of Programmable I/os
16
Number Of Timers
3
Operating Supply Voltage
3 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
Minimum Operating Temperature
- 40 C
Data Rom Size
128 B
Height
2.31 mm
Length
11.53 mm
Supply Voltage (max)
5.5 V
Supply Voltage (min)
3 V
Width
7.49 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT18SO-1 - SOCKET TRANSITION 18SOIC 300MILAC164010 - MODULE SKT PROMATEII DIP/SOIC
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
PIC16F628-04I/SOR
PIC16F628-04I/SOR
PIC16F628-04I/SOR
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC16F628-04I/SO
Manufacturer:
MIC
Quantity:
20 000
PIC16F62X
11.3
In Pulse Width Modulation (PWM) mode, the CCP1 pin
produces up to a 10-bit resolution PWM output. Since
the CCP1 pin is multiplexed with the PORTB data latch,
the TRISB<3> bit must be cleared to make the CCP1
pin an output.
Figure 11-2 shows a simplified block diagram of the
CCP module in PWM mode.
For a step-by-step procedure on how to set up the CCP
module for PWM operation, see Section 11.3.3.
FIGURE 11-2:
DS40300C-page 64
Note:
Note
CCPR1L
CCPR1H (Slave)
Comparator
Duty cycle registers
PR2
TMR2
1:
Comparator
PWM Mode
Clearing the CCP1CON register will force
the CCP1 PWM output latch to the default
low level. This is not the PORTB I/O data
latch.
8-bit timer is concatenated with the 2-bit internal
Q clock, or 2 bits of the prescaler to create 10-bit
time-base.
(Note 1)
Clear Timer,
CCP1 pin and
latch D.C.
SIMPLIFIED PWM BLOCK
DIAGRAM
CCP1CON<5:4>
R
S
Q
TRISB<3>
RB3/CCP1
Preliminary
A PWM output (Figure 11-3) has a time-base (period)
and a time that the output stays high (duty cycle). The
frequency of the PWM is the inverse of the period
(1/period).
FIGURE 11-3:
11.3.1
The PWM period is specified by writing to the
PR2register. The PWM period can be calculated using
the following formula:
PWM frequency is defined as 1 / [PWM period].
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 PWM duty
• The PWM duty cycle is latched from CCPR1L into
cycle = 0%, the CCP1 pin will not be set)
CCPR1H
Note:
PWM period = [(PR2) + 1] • 4 • T
TMR2 = PR2
Duty Cycle
The Timer2 postscaler (see Section 8.0) is
not used in the determination of the PWM
frequency. The postscaler could be used to
have an interrupt occur at a different fre-
quency than the PWM output.
PWM PERIOD
Period
TMR2 = Duty Cycle
(TMR2 prescale value)
PWM OUTPUT
2003 Microchip Technology Inc.
TMR2 = PR2
OSC
•