PIC18LF8723T-I/PT Microchip Technology, PIC18LF8723T-I/PT Datasheet - Page 35

• Manufacturer Part Number: PIC18LF8723T-I/PT
• Description: PIC18 With 128KB Flash, 4KB RAM, 1024 DataEE, 12-bit ADC 80 TQFP 12x12x1mm T/R
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18LF8723T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 16x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PIC18LF8723T-I/PTTR

5.3
The LVP bit in Configuration register, CONFIG4L,
enables single-supply (low-voltage) ICSP program-
ming. The LVP bit defaults to a ‘1’ (enabled) from the
factory.
If Single-Supply Programming mode is not used, the
LVP bit can be programmed to a ‘0’ and RB5/PGM
becomes a digital I/O pin. However, the LVP bit may only
be programmed by entering the High-Voltage ICSP
mode, where MCLR/V
the LVP bit is programmed to a ‘0’, only the High-Voltage
ICSP mode is available and only the High-Voltage ICSP
mode can be used to program the device.
5.4
To allow portability of code, a PIC18F872X device
programmer is required to read the Configuration Word
locations from the hex file. If Configuration Word
information is not present in the hex file, then a simple
warning message should be issued. Similarly, while
saving a hex file, all Configuration Word information
must be included. An option to not include the Configu-
ration Word information may be provided. When
embedding Configuration Word information in the hex
file, it should start at address, 300000h.
Microchip Technology Inc. feels strongly that this
feature is important for the benefit of the end customer.
© 2009 Microchip Technology Inc.
Note 1: The High-Voltage ICSP mode is always
2: While in Low-Voltage ICSP mode, the
Single-Supply ICSP Programming
Embedding Configuration Word
Information in the HEX File
available, regardless of the state of the
LVP bit, by applying V
V
RB5 pin can no longer be used as a
general purpose I/O.
PP
/RG5 pin.
PP
/RG5 is raised to V
IHH
to the MCLR/
IHH
. Once
5.5
To allow portability of code, a PIC18F872X device
programmer is required to read the data EEPROM
information from the hex file. If data EEPROM informa-
tion is not present, a simple warning message should
be issued. Similarly, when saving a hex file, all data
EEPROM information must be included. An option to
not include the data EEPROM information may be
provided. When embedding data EEPROM information
in the hex file, it should start at address, F00000h.
Microchip Technology Inc. believes that this feature is
important for the benefit of the end customer.
5.6
The checksum is calculated by summing the following:
• The contents of all code memory locations
• The Configuration Word, appropriately masked
• ID locations
The Least Significant 16 bits of this sum are the
checksum.
Table 5-4 (pages 36 through 39) describes how to
calculate the checksum for each device.
PIC18F872X FAMILY
Note:
Embedding Data EEPROM
Information in the HEX File
Checksum Computation
The checksum calculation differs depend-
ing on the code-protect setting. Since the
code memory locations read out differently
depending on the code-protect setting, the
table describes how to manipulate the
actual code memory values to simulate
the values that would be read from a
protected device. When calculating a
checksum by reading a device, the entire
code memory can simply be read and
summed. The Configuration Word and ID
locations can always be read.
DS39643C-page 35