PIC18F66J15-I/PT Microchip Technology, PIC18F66J15-I/PT Datasheet - Page 183

• Manufacturer Part Number: PIC18F66J15-I/PT
• Description: IC PIC MCU FLASH 48KX16 64TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F66J15-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 96KB (48K x 16)
• Package / Case: 64-TFQFP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 50
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3936 B
• Interface Type: SPI/I2C/EUSART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 50
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, DV164136, DM183032, DM183022
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 11-ch x 10-bit
• Package: 64TQFP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Operating Supply Voltage: 2.5|3.3 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MA180015 - MODULE PLUG-IN 18F87J10 FOR HPCAC162062 - HEADER INTRFC MPLAB ICD2 64/80PAC164327 - MODULE SKT FOR 64TQFP
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

18.4
The Enhanced PWM mode provides additional PWM
output options for a broader range of control applica-
tions. The module is a backward compatible version of
the standard CCP module and offers up to four outputs,
designated PxA through PxD. Users are also able to
select the polarity of the signal (either active-high or
active-low). The module’s output mode and polarity
are configured
CCPxM<3:0>
(CCPxCON<7:6> and CCPxCON<3:0>, respectively).
For the sake of clarity, Enhanced PWM mode operation
is described generically throughout this section with
respect to ECCP1 and TMR2 modules. Control register
names are presented in terms of ECCP1. All three
Enhanced modules, as well as the two timer resources,
can be used interchangeably and function identically.
TMR2 or TMR4 can be selected for PWM operation by
selecting the proper bits in T3CON.
Figure 18-1 shows a simplified block diagram of PWM
operation. All control registers are double-buffered and
are loaded at the beginning of a new PWM cycle (the
period boundary when Timer2 resets) in order to pre-
vent glitches on any of the outputs. The exception is the
PWM Delay register, ECCP1DEL, which is loaded at
either the duty cycle boundary or the boundary period
(whichever comes first). Because of the buffering, the
module waits until the assigned timer resets instead of
starting immediately. This means that Enhanced PWM
FIGURE 18-1:
© 2009 Microchip Technology Inc.
Enhanced PWM Mode
Note: The 8-bit timer TMR2 register is concatenated with the 2-bit internal Q clock, or 2 bits of the prescaler, to create the 10-bit
CCPR1H (Slave)
Duty Cycle Registers
Comparator
time base.
CCPR1L
TMR2
bits
PR2
Comparator
by
setting
of
SIMPLIFIED BLOCK DIAGRAM OF THE ENHANCED PWM MODULE
(Note 1)
the
Clear Timer,
set ECCP1 pin and
latch D.C.
the
CCP1CON<5:4>
CCPxCON
PxM<1:0>
R
S
register
P1M1<1:0>
Q
and
ECCP1DEL
PIC18F87J10 FAMILY
Controller
ECCP1/P1A
waveforms do not exactly match the standard PWM
waveforms, but are instead offset by one full instruction
cycle (4 T
As before, the user must manually configure the
appropriate TRIS bits for output.
18.4.1
The PWM period is specified by writing to the PR2
register. The PWM period can be calculated using the
equation:
EQUATION 18-1:
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 ECCP1 pin is set (if PWM duty cycle = 0%,
• The PWM duty cycle is copied from CCPR1L into
Output
2
the ECCP1 pin will not be set)
CCPR1H
Note:
P1C
P1D
P1B
PWM Period = [(PR2) + 1] • 4 • T
4
CCP1M<3:0>
OSC
PWM PERIOD
The Timer2 postscaler (see Section 14.0
“Timer2 Module”) is not used in the
determination of the PWM frequency. The
postscaler could be used to have a servo
update rate at a different frequency than
the PWM output.
).
TRISx<x>
TRISx<x>
TRISx<x>
TRISx<x>
(TMR2 Prescale Value)
ECCP1/P1A
P1B
P1C
P1D
DS39663F-page 181
OSC
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