PIC18F2539T-I/SO Microchip Technology, PIC18F2539T-I/SO Datasheet - Page 22

• 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

PIC18FXX39
4.3
The verify step involves reading back the code memory
space and comparing against the copy held in the
programmer’s buffer. Memory reads occur a single byte
at a time, so two bytes must be read to compare
against the word in the programmer’s buffer. Refer to
Section 4.2 for implementation details of reading code
memory.
FIGURE 4-4:
4.4
A configuration address may be read and output on
SDATA via the 4-bit command, ‘1001’. Configuration
data is read and written in a byte-wise fashion, so it is
not necessary to merge two bytes into a word prior to a
compare. The result may then be immediately
compared to the appropriate configuration data in the
programmer’s memory for verification. Refer to
Section 4.2 for implementation details of reading
configuration data.
DS30480C-page 22
Verify Code Memory and ID
Locations
Verify Configuration Bits
No
Read High Byte
Read Low Byte
Set Pointer = 0
word = expect
VERIFY CODE MEMORY FLOW
code memory
verified?
data?
Does
Start
All
Yes
Yes
No
Failure,
Report
Error
Preliminary
The Table Pointer must be manually set to 200000h
(base address of the ID locations) once the code
memory has been verified. The post-increment feature
of the Table Read 4-bit command may not be used to
increment the Table Pointer beyond 1FFFFFh.
4.5
A data EEPROM address may be read via a sequence
of core instructions (4-bit command, ‘0000’) and then
output on SDATA via the 4-bit command, ‘0010’ (shift
out data holding register). The result may then be
immediately compared to the appropriate data in the
programmer’s memory for verification. Refer to
Section 4.1 for implementation details of reading data
EEPROM.
No
Verify Data EEPROM
Set Pointer = 200000h
Read High Byte
Read Low Byte
word = expect
ID locations
verified?
data?
Does
Done
All
Yes
Yes
 2010 Microchip Technology Inc.
No
Failure,
Report
Error