PIC18F8520-I/PTG Microchip Technology, PIC18F8520-I/PTG Datasheet - Page 21

• Manufacturer Part Number: PIC18F8520-I/PTG
• Description: IC MCU FLASH 16KX16 80TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F8520-I/PTG

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 68
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TFQFP
• For Use With: XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFPAC164320 - MODULE SKT MPLAB PM3 80TQFPAC174011 - MODULE SKT PROMATEII 80TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.2
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 4.1 for implementation details of reading code
memory.
FIGURE 4-2:
 2010 Microchip Technology Inc.
Verify Code Memory and ID
locations
No
Read High byte
Read Low Byte
Set Pointer = 0
Word = Expect
Code Memory
VERIFY CODE MEMORY FLOW
Verified?
Data?
Does
Start
All
Yes
Yes
No
Failure,
Report
Error
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 the code memory
space. In a 32-Kbyte device, for example, a
post-increment read of address 7FFFh will wrap the
Table Pointer back to 0000h, rather than point to
unimplemented address 8000h.
No
Set Pointer = 200000h
Read Low Byte
Read High byte
Word = Expect
ID Locations
Verified?
Data?
Done
Does
All
Yes
Yes
PIC18FXX20
No
DS39583C-page 21
Failure,
Report
Error