PIC18F87K90-E/PT Microchip Technology, PIC18F87K90-E/PT Datasheet - Page 257

• Manufacturer Part Number: PIC18F87K90-E/PT
• Description: 128kB Flash, 4kB RAM, 1kB EE, 16MIPS, NanoWatt XLP, LCD, 5V 80 TQFP 12x12x1mm TR
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F87K90-E/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 64MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 24x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 80-TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

19.4
The Enhanced PWM mode can generate a PWM signal
on up to four different output pins with up to 10 bits of
resolution. It can do this through four different PWM
Output modes:
• Single PWM
• Half-Bridge PWM
• Full-Bridge PWM, Forward mode
• Full-Bridge PWM, Reverse mode
To select an Enhanced PWM mode, the PxM bits of the
CCPxCON register must be set appropriately.
FIGURE 19-3:
 2009-2011 Microchip Technology Inc.
Note:
Note 1: The 8-bit TMR2 register is concatenated with the 2-bit internal Q clock, or 2 bits of the prescaler to create
CCPR1H (Slave)
PWM (Enhanced Mode)
Comparator
Duty Cycle Registers
CCPR1L
The TRIS register value for each PWM output must be configured appropriately.
Any pin not used by an Enhanced PWM mode is available for alternate pin functions.
PR2
TMR2
Comparator
the 10-bit time base.
(Note 1)
EXAMPLE SIMPLIFIED BLOCK DIAGRAM OF THE ENHANCED PWM MODE
Clear Timer2,
Toggle PWM Pin and
Latch Duty Cycle
DC1B<1:0>
R
S
Q
PxM<1:0>
ECCP1DEL
Controller
ECCPx/PxA
Output
2
PIC18F87K90 FAMILY
The PWM outputs are multiplexed with I/O pins and are
designated: PxA, PxB, PxC and PxD. The polarity of the
PWM pins is configurable and is selected by setting the
CCPxM bits in the CCPxCON register appropriately.
Table 19-1
Enhanced PWM mode.
Figure 19-3
diagram of the Enhanced PWM module.
Note:
PxB
PxC
PxD
4
CCPxM<3:0>
TRIS
TRIS
TRIS
TRIS
To
incomplete waveform when the PWM is
first enabled, the ECCP module waits until
the start of a new PWM period before
generating a PWM signal.
provides the pin assignments for each
provides an example of a simplified block
prevent
the
generation
ECCP1/Output Pi
Output Pi
Output Pi
Output Pi
DS39957D-page 257
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