PIC18F2539T-I/SO Microchip Technology, PIC18F2539T-I/SO Datasheet - Page 27

• Manufacturer Part Number: PIC18F2539T-I/SO
• Description: IC MCU FLASH 12KX16 EE AD 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2539T-I/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 21
• Program Memory Size: 24KB (12K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1408 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 1408 B
• Interface Type: I2C, SPI, AUSART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 21
• Number Of Timers: 16 bit
• 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: DV164005, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 5 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.4
To
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
configuration 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.
 2010 Microchip Technology Inc.
allow
Embedding Configuration Word
Information in the HEX File
portability
of
code,
a
PIC18FXX39
Preliminary
5.5
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 describes how to calculate the checksum for
each device.
Note 1: The checksum calculation differs depend-
Checksum Computation
ing on the code protect setting. Since the
code memory locations read out differ-
ently depending on the code protect set-
ting,
manipulate the actual code memory val-
ues to simulate the values that would be
read from a protected device. When cal-
culating 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.
the
PIC18FXX39
table
describes
DS30480C-page 27
how
to