PIC18F4550-I/P Microchip Technology Inc., PIC18F4550-I/P Datasheet - Page 152

• Manufacturer Part Number: PIC18F4550-I/P
• Description: 40 PIN, 32 KB FLASH, 2048 RAM, FS-USB 2.0
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F4550-I/P

• A/d Inputs: 13-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 12 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 34
• Interface: I2C/SPI/UART/USART/USB
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 32K Bytes
• Ram Size: 2K Bytes
• Speed: 48 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC18F2455/2550/4455/4550
In addition to the expanded range of modes available
through the CCP1CON register, the ECCP module has
two additional registers associated with Enhanced
PWM operation and auto-shutdown features. They are:
• ECCP1DEL (Dead-Band Delay)
• ECCP1AS (Auto-Shutdown Configuration)
16.1
The Enhanced CCP module may have up to four PWM
outputs, depending on the selected operating mode.
These outputs, designated P1A through P1D, are
multiplexed with I/O pins on PORTC and PORTD. The
outputs that are active depend on the CCP operating
mode selected. The pin assignments are summarized
in Table 16-1.
To configure the I/O pins as PWM outputs, the proper
PWM mode must be selected by setting the
P1M1:P1M0
appropriate TRISC and TRISD direction bits for the port
pins must also be set as outputs.
16.1.1
Like the standard CCP modules, the ECCP module can
utilize Timers 1, 2 or 3, depending on the mode
selected. Timer1 and Timer3 are available for modules
in Capture or Compare modes, while Timer2 is
available for modules in PWM mode. Interactions
between the standard and Enhanced CCP modules are
identical to those described for standard CCP modules.
Additional details on timer resources are provided in
Section 15.1.1
Resources”.
TABLE 16-1:
DS39632C-page 150
Compatible CCP
Dual PWM
Quad PWM
Legend: x = Don’t care. Shaded cells indicate pin assignments not used by ECCP in a given mode.
ECCP Mode
ECCP Outputs and Configuration
ECCP MODULES AND TIMER
RESOURCES
and
PIN ASSIGNMENTS FOR VARIOUS ECCP1 MODES
“CCP
CCP1M3:CCP1M0
Configuration
Modules
00xx 11xx
10xx 11xx
x1xx 11xx
CCP1CON
and
All PIC18F4455/4550 devices:
bits.
Timer
The
Preliminary
CCP1
RC2
P1A
P1A
16.2
Except for the operation of the Special Event Trigger
discussed below, the Capture and Compare modes of
the ECCP module are identical in operation to that of
CCP. These are discussed in detail in Section 15.2
“Capture
Mode”.
16.2.1
The Special Event Trigger output of ECCP resets the
TMR1 or TMR3 register pair, depending on which timer
resource is currently selected. This allows the
CCPR1H:CCPR1L registers to effectively be a 16-bit
programmable period register for Timer1 or Timer3.
16.3
When configured in Single Output mode, the ECCP
module functions identically to the standard CCP
module in PWM mode as described in Section 15.4
“PWM Mode”. This is also sometimes referred to as
“Compatible CCP” mode, as in Table 16-1.
Note:
RD5/SPP5
RD5
P1B
P1B
Capture and Compare Modes
Standard PWM Mode
SPECIAL EVENT TRIGGER
When setting up single output PWM
operations, users are free to use either of
the processes described in Section 15.4.4
“Setup
Section 16.4.9 “Setup for PWM Opera-
tion”. The latter is more generic but will
work for either single or multi-output PWM.
Mode”
and
for
RD6/SPP6
RD6/SPP6
© 2006 Microchip Technology Inc.
RD6
P1C
Section 15.3
PWM
Operation”
RD7/SPP7
RD7/SPP7
“Compare
RD7
P1D
or