PIC18F4455-I/PT Microchip Technology, PIC18F4455-I/PT Datasheet - Page 308

• 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

PIC18F2455/2550/4455/4550
Even when the dedicated port is enabled, the ICSP and
ICD functions remain available through the legacy port.
When V
of the ICRST/ICV
25.9.2
PIC18F4455/4550 devices in 44-pin TQFP packages
also have the ability to change their configuration under
external control for debugging purposes. This allows
the device to behave as if it were a PIC18F2455/2550
28-pin device.
This 28-pin Configuration mode is controlled through a
single pin, NC/ICPORTS. Connecting this pin to V
forces the device to function as a 28-pin device.
Features normally associated with the 40/44-pin
devices are disabled along with their corresponding
control registers and bits. This includes PORTD and
PORTE, the SPP and the Enhanced PWM functionality
of CCP1. On the other hand, connecting the pin to V
forces the device to function in its default configuration.
The configuration option is only available when back-
ground debugging and the dedicated ICD/ICSP port
are both enabled (DEBUG Configuration bit is clear
and ICPRT Configuration bit is set). When disabled,
NC/ICPORTS is a No Connect pin.
25.10 Single-Supply ICSP Programming
The LVP Configuration bit enables Single-Supply ICSP
Programming (formerly known as Low-Voltage ICSP
Programming or LVP). When Single-Supply Program-
ming
programmed without requiring high voltage being
applied
RB5/KBI1/PGM pin is then dedicated to controlling
Program mode entry and is not available as a general
purpose I/O pin.
While programming using Single-Supply Program-
ming, V
normal execution mode. To enter Programming mode,
V
DS39632D-page 306
DD
Note 1: The ICPRT Configuration bit can only be
is applied to the PGM pin.
is
DD
IH
2: The ICPRT Configuration bit must be
to
is seen on the MCLR/V
is applied to the MCLR/V
enabled,
28-PIN EMULATION
programmed through the default ICSP
port.
maintained clear for all 28-pin and 40-pin
devices; otherwise, unexpected operation
may occur.
the
PP
MCLR/V
pin is ignored.
the
microcontroller
PP
/RE3
PP
/RE3 pin, the state
PP
pin,
/RE3 pin as in
but
can
Preliminary
the
DD
SS
be
If Single-Supply ICSP Programming mode will not be
used, the LVP bit can be cleared. RB5/KBI1/PGM then
becomes available as the digital I/O pin, RB5. The LVP
bit may be set or cleared only when using standard
high-voltage programming (V
MCLR/V
only the standard high-voltage programming is
available and must be used to program the device.
Memory that is not code-protected can be erased using
either a Block Erase, or erased row by row, then written
at any specified V
erased, a Block Erase is required. If a Block Erase is to
be performed when using Low-Voltage Programming,
the device must be supplied with V
Note 1: High-Voltage Programming is always
PP
2: While in Low-Voltage ICSP Programming
3: When using Low-Voltage ICSP Program-
4: If the device Master Clear is disabled,
/RE3 pin). Once LVP has been disabled,
available, regardless of the state of the
LVP bit, by applying V
mode, the RB5 pin can no longer be used
as a general purpose I/O pin and should
be held low during normal operation.
ming (LVP) and the pull-ups on PORTB
are enabled, bit 5 in the TRISB register
must be cleared to disable the pull-up on
RB5 and ensure the proper operation of
the device.
verify that either of the following is done to
ensure proper entry into ICSP mode:
a) disable Low-Voltage Programming
b) make certain that RB5/KBI1/PGM
(CONFIG4L<2> = 0); or
is held low during entry into ICSP.
DD
. If code-protected memory is to be
© 2007 Microchip Technology Inc.
IHH
IHH
DD
to the MCLR pin.
applied to the
of 4.5V to 5.5V.