PIC18F2539-E/SO Microchip Technology, PIC18F2539-E/SO Datasheet - Page 2

• Manufacturer Part Number: PIC18F2539-E/SO
• Description: IC PIC MCU FLASH 12KX16 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2539-E/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 ~ 125°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: + 125 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

PIC18FXX39
3. Module: Core (Program Memory Space)
4. Module: Data EEPROM
DS80148A-page 2
Performing Table Read operations above the user
Program
1FFFFFh) may yield erroneous results at the
extreme low end of the device’s rated temperature
range (-40°C).
This applies specifically to addresses above
1FFFFFh, including the User ID locations
(200000h - 200007h), the configuration bytes
(300000h - 30000Dh), and the Device ID locations
(3FFFFEh and 3FFFFFh). User program memory
is unaffected.
Work around
Three possible work arounds are presented. Other
solutions may exist.
1. Do not perform Table Read operations on areas
2. Insert NOP instructions (specifically, literal FFFFh)
Date Codes that pertain to this issue:
All engineering and production devices.
When reading the data EEPROM, the contents of
the EEDATA register may be corrupted if the RD
bit (EECON1<0>) is set immediately following a
write to the address byte (EEADR). The actual
contents of the data EEPROM remain unaffected.
Work around
Do not set EEADR immediately before the execu-
tion of a read. Write to EEADR at least one instruc-
tion cycle before setting the RD bit. The instruction
between the write to EEADR and the read can be
any valid instruction, including a NOP.
Date Codes that pertain to this issue:
All engineering and production devices.
above the User Memory Space at -40°C.
around any Table Read instructions. The sug-
gested optimal number is 4 instructions before
and 8 instructions after each Table Read. This
may vary, depending upon the particular
application, and should be optimized by the user.
Memory
space
(addresses
over
Clarifications/Corrections to the Data Sheet:
In the Device Data Sheet (DS30485A), the following
clarifications and corrections should be noted.
None.
 2002 Microchip Technology Inc.