PIC18F2320-E/SO Microchip Technology, PIC18F2320-E/SO Datasheet - Page 22

• Manufacturer Part Number: PIC18F2320-E/SO
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SOP,28PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2320-E/SO

• Rohs Compliant: YES
• 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: 25
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC18FX220/X320
4.3
The verify step involves reading back the code memory
space and comparing it 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 “Read Code Memory, ID Locations and
Configuration Bits” for implementation details of
reading code memory.
FIGURE 4-4:
4.4
A configuration address may be read and output on
PGD 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 “Read Code Memory, ID Locations and
Configuration Bits” for implementation details of
reading configuration data.
DS39592F-page 22
Verify Code Memory and 
ID Locations
Verify Configuration Bits
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). The post-increment
feature of the table read 4-bit command may not be
used to increment the Table Pointer to 200000h. The
post-increment feature may then be used to increment
to 200001h, 200002h, etc.
4.5
A data EEPROM address may be read via a sequence
of core instructions (4-bit command, ‘0000’) and then
output on PGD 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 “Read Data EEPROM Memory” 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