PIC18F4455-I/PT Microchip Technology, PIC18F4455-I/PT Datasheet - Page 5

• Manufacturer Part Number: PIC18F4455-I/PT
• Description: IC PIC MCU FLASH 12KX16 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4455-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 24KB (12K x 16)
• Package / Case: 44-TQFP, 44-VQFP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 35
• Eeprom Size: 256 x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 13x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 24 KB
• Interface Type: SPI, I2C, EAUSART
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 35
• Number Of Timers: 4
• Operating Supply Voltage: 2 V to 5.5 V
• 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, ICE2000, ICE4000, DV164136, DM163025
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Package: 44TQFP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 48 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT44PT3 - SOCKET TRAN ICE 44MQFP/TQFPI3-DB18F4550 - BOARD DAUGHTER ICEPIC3DM163025 - PIC DEM FULL SPEED USB DEMO BRDAC164305 - MODULE SKT FOR PM3 44TQFP444-1001 - DEMO BOARD FOR PICMICRO MCUAC164020 - MODULE SKT PROMATEII 44TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5. Module: ECCP
EXAMPLE 4:
6. Module: ECCP
© 2008 Microchip Technology Inc.
When monitoring a shutdown condition using a bit
test on the ECCPASE bit (ECCP1AS<7>), or
performing a bit operation on the ECCPASE bit,
the device may produce unexpected results.
Work around
Before performing a bit test or bit operation on the
ECCPASE bit, copy the ECCP1AS register to the
working register and perform the operation there.
By avoiding these operations on the ECCPASE bit
in the ECCP1AS register, the module will operate
normally.
In Example 4, ECCPASE bit operations are
performed on the W register.
Date Codes that pertain to this issue:
All engineering and production devices.
When the CCP1 auto-shutdown feature is con-
figured for automatic restart by setting the PRSEN
bit (ECCP1DEL<7>), the pulse terminates imme-
diately in a shutdown event. In addition, the pulse
may restart within the period if the shutdown
condition expires. This may result in the generation
of short pulses on the PWM output(s).
Work around
Configure the auto-shutdown for software restart
by clearing the PRSEN bit (ECCP1DEL<7>). The
PWM can be re-enabled by clearing the
ECCPASE bit (ECCP1AS<7>) after the shutdown
condition expires.
Date Codes that pertain to this issue:
All engineering and production devices.
MOVF
BTFSC
BRA
ECCP1AS, W
WREG, ECCPASE
SHUTDOWN_ROUTINE
PIC18F2455/2550/4455/4550
7. Module: ECCP
When operating either Timer1 or Timer3 as a
counter with a prescale value other than 1:1 and
operating the ECCP in Compare mode with the
Special
CCP1M3:CCP1M0 = 1011), the Special Event
Trigger Reset of the timer occurs as soon as there
is
CCPR1H:CCPR1L.
This differs from the PIC18F452, where the Special
Event Trigger Reset of the timer occurs on the next
rollover of the prescale counter after the match
between TMRxH:TMRxL and CCPR1H:CCPR1L.
Work around
To achieve the same timer Reset period on the
PIC18F4550 family as the PIC18F452 family for a
given clock source, add 1 to the value in
CCPR1H:CCPR1L.
CCPR1H:CCPR1L = x for the PIC18F452, to
achieve
PIC18F4550 family, CCPR1H:CCPR1L = x + 1,
where the prescale is 1, 2, 4 or 8 depending on the
T1CKPS1:T1CKPS0 bit values.
Date Codes that pertain to this issue:
All engineering and production devices.
a
match
the
Event
same
between
Trigger
In
Reset
TMRxH:TMRxL
other
(CCP1CON
period
DS80220J-page 5
words,
on
bits,
and
the
if