PIC18F2320-I/SO Microchip Technology, PIC18F2320-I/SO Datasheet - Page 16

• 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
3.4
Data EEPROM is accessed one byte at a time via an
Address Pointer, EEADR, and a Data Latch, EEDATA.
Data EEPROM is written by loading EEADR with the
desired memory location, loading EEDATA with the
data to be written and initiating a memory write by
appropriately configuring the EECON1 and EECON2
registers. A byte write automatically erases the location
and writes the new data (erase-before-write).
When using the EECON1 register to perform a data
EEPROM write, the EEPGD bit must be cleared
(EECON1<7> = 0) and the CFGS bit must be cleared
(EECON1<6> = 0). The WREN bit must be set
(EECON1<2> = 1) to enable writes of any sort and this
must be done prior to initiating a write sequence.
To help prevent inadvertent writes when using the
EECON1 register, EECON2 is used to “enable” the WR
bit. This register must be sequentially loaded with 55h,
and then 0AAh, immediately prior to asserting the WR
bit in order for the write to occur. The write sequence is
initiated by setting the WR bit (EECON1<1> = 1). It is
strongly recommended that the WREN bit be set only
when absolutely necessary.
The write will begin on the falling edge of the 4th PGC
after the WR bit is set.
After the programming sequence terminates, PGC must
still be held low for the time specified by parameter P10
to allow high-voltage discharge of the memory array.
FIGURE 3-8:
DS39592F-page 16
PGC
PGD
4-Bit Command
Data EEPROM Programming
1
0
2
0
3
0
4
0
P5
DATA EEPROM WRITE TIMING
BSF EECON1, WR
1
2
15 16
P5A
4-Bit Command
1
0
2
0
3
0
4
0
PGD = Input
P5
1
0
Data Payload
2
0
16-Bit
FIGURE 3-7:
15 16
0
0
P5A
4-Bit Command
1
0
2
0
3
No
0
4
0
Unlock Sequence
for Write to Occur
0AAh – EECON2
Delay P11 + P10
PROGRAM DATA FLOW
55h – EECON2
 2010 Microchip Technology Inc.
Enable Write
Set Address
Start Write
Sequence
Set Data
Data EEPROM
Done?
Done
Start
Write Time
P11
Yes
P11
Data Payload
16-Bit
1
n
2
n