PIC18F2320-I/SO Microchip Technology, PIC18F2320-I/SO Datasheet - Page 10

• Manufacturer Part Number: PIC18F2320-I/SO
• Description: IC MCU FLASH 4KX16 EEPROM 28SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F2320-I/SO

• Core Size: 8-Bit
• Program Memory Size: 8KB (4K x 16)
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 25
• 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 ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: PIC18
• No. Of I/o's: 25
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 512Byte
• Cpu Speed: 40MHz
• No. Of Timers: 4
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SPI, I2C, USART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 25
• Number Of Timers: 2 x 8 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: PG164130, DV164035, DV244005, DV164005, PG164120, ICE4000, ICE2000, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Package: 28SOIC W
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 40 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT28SO-1 - SOCKET TRANSITION 28SOIC 300MIL
• Lead Free Status / Rohs Status: Details

PIC18FX220/X320
3.0
3.1
The term “Blank Check” means to verify that the device
has no programmed memory cells. All memories must
be verified: code memory, data EEPROM, ID locations
and Configuration bits. The Device ID registers
(3FFFFEh:3FFFFFh) should be ignored.
A “blank” or “erased” memory cell will read as ‘1’.
So, “Blank Checking” a device merely means to
verify that all bytes read as FFh except the
Configuration bits. Unused (reserved) Configuration
bits will read as ‘0’ (programmed). Refer to Table 5-2
for blank configuration expected data for the various
devices.
If it is determined that the device is not blank, then the
device should be Bulk Erased (see Section 3.2 “High-
Voltage ICSP Bulk Erase”) before any attempt to
program is made.
Given that “Blank Checking” is merely code and data
EEPROM verification, with FFh as the expected data,
refer to Section 4.1 “Read Data EEPROM Memory”
and Section 4.3 “Verify Code Memory and ID
Locations” for implementation details.
FIGURE 3-1:
DS39592F-page 10
Blank Check Device
Blank Check Device
DEVICE PROGRAMMING
Blank Check
Bulk Erase Device
device
blank?
blank?
device
Abort
Start
Is
Is
No
No
BLANK CHECK FLOW
Yes
Yes
Continue
Continue
3.2
Erasing code or data EEPROM is accomplished by
writing an “erase option” to address 3C0004h. Code
memory may be erased, portions at a time, or the user
may erase the entire device in one action. “Bulk Erase”
operations will also clear any code-protect settings
associated with the memory block erased. Erase
options are detailed in Table 3-1.
TABLE 3-1:
The actual Bulk Erase function is a self-timed
operation. Once the erase has started (falling edge of
the 4th PGC after the write command), serial execution
will cease until the erase completes (parameter P11).
During this time, PGC may continue to toggle, but PGD
must be held low.
The code sequence to erase the entire device is shown
in Table 3-2 and the flowchart is shown in Figure 3-2.
TABLE 3-2:
Chip Erase
Erase Data EEPROM
Erase Boot Block
Erase Block 0
Erase Block 1
Erase Block 2
Erase Block 3
Command
Note:
0000
0000
0000
0000
0000
0000
1100
0000
0000
4-Bit
High-Voltage ICSP Bulk Erase
A Bulk Erase is the only way to reprogram
code-protect bits from an ON state to an
OFF state.
Payload
Description
0E 3C
6E F8
0E 00
6E F7
0E 04
6E F6
00 80
00 00
00 00
Data
BULK ERASE OPTIONS
BULK ERASE COMMAND
SEQUENCE
MOVLW 3Ch
MOVWF TBLPTRU
MOVLW 00h
MOVWF TBLPTRH
MOVLW 04h
MOVWF TBLPTRL
Write 80h TO 3C0004h to
erase entire device.
NOP
Hold PGD low until
erase completes.
 2010 Microchip Technology Inc.
Core Instruction
Data
83h
88h
89h
8Ah
8Bh
80h
81h