PIC18F45K20-E/ML Microchip Technology, PIC18F45K20-E/ML Datasheet - Page 62

• Manufacturer Part Number: PIC18F45K20-E/ML
• Description: 32KB, Flash, 1536bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 44 QFN 8x8x0.9mm TU
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F45K20-E/ML

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 35
• 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): 1.8 V ~ 3.6 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 44-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DM240313 - BOARD DEMO 8BIT XLPAC164112 - VOLTAGE LIMITER MPLAB ICD2 VPPDM164124 - KIT STARTER FOR PIC18F4XK20AC164322 - MODULE SOCKET MPLAB PM3 28/44QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PICkit™ 3 Debug Express
3.10
FIGURE 3-49:
DS41370C-page 58
LESSON 10: USING INTERNAL EEPROM
The PIC18F45K20 microcontroller includes 256 bytes of on-chip EEPROM for data
storage. This lesson discusses reading and writing the internal EEPROM in software.
3.10.1
The EECON1 Special Function Register controls operations to both the internal
EEPROM as well as the program memory Flash array.
EECON1: EEPROM CONTROL REGISTER 1
Key Concepts
- The 4 SFRs that control EEPROM operations are EECON1, EECON2,
- The internal EEPROM is written and read one byte at a time.
- To write EEPROM, a short code sequence must be written to EECON2
- Writing a byte to EEPROM takes a period of time before the write cycle is
EEDATA and EEADR.
immediately before starting the write operation. This is to prevent inadvertent
EEPROM writes.
complete. The microcontroller will continue to execute code during an
EEPROM write cycle.
Reading a data byte from EEPROM
© 2009 Microchip Technology Inc.