PIC18F452-I/PG Microchip Technology, PIC18F452-I/PG Datasheet - Page 21

• Manufacturer Part Number: PIC18F452-I/PG
• Description: IC MCU FLASH 16KX16 W/AD 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F452-I/PG

• 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: 34
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• For Use With: ACICE0206 - ADAPTER MPLABICE 40P 600 MIL
• 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 pro-
grammer’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 mem-
ory 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.
No
Set Pointer = 200000h
PIC18FXX2/XX8
Read High Byte
Read Low Byte
word = expect
ID locations
verified?
data?
Done
Does
All
Yes
Yes
No
DS39576C-page 21
Failure,
Report
Error