PIC18F45K20-I/ML Microchip Technology, PIC18F45K20-I/ML Datasheet - Page 70

• Manufacturer Part Number: PIC18F45K20-I/ML
• Description: IC PIC MCU FLASH 16KX16 44QFN
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F45K20-I/ML

• Program Memory Type: FLASH
• Program Memory Size: 32KB (16K x 16)
• Package / Case: 44-QFN
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 64MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 35
• 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 ~ 85°C
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 1.5 KB
• Interface Type: CCP/ECCP/EUSART/I2C/MSSP/SPI
• Maximum Clock Frequency: 64 MHz
• Number Of Programmable I/os: 36
• Number Of Timers: 4
• 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, DV164136
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 14-ch x 10-bit
• Package: 44QFN EP
• Device Core: PIC
• Family Name: PIC18
• Maximum Speed: 64 MHz
• Operating Supply Voltage: 2.5|3.3 V
• 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
FIGURE 3-54:
FIGURE 3-55:
DS41370C-page 66
3.11.3
At compile time, when the project is built, the Lesson 11 source code places three
strings in Flash program memory at address 0x100:
After building the project, the strings can be seen in program memory by opening the
Program Memory window in the MPLAB IDE using View > Program Memory.
STRINGS IN PROGRAM MEMORY
The program code doesn’t start until address 0x280.
Build and program the Lesson 11 code and set a breakpoint on the first pointer
assignment statement as shown in Figure 3-55.
BREAKPOINT ON POINTER ASSIGNMENT
Run the program until it stops at the breakpoint. Step through the do while loop in
Figure 3-55 and observe the characters of the hello_str[] string are read into the
singlechar variable one at a time until the terminating ‘0’ value of the string is
reached.
The next statement demonstrates reading from an explicit program memory address
using a function:
#pragma romdata mystrings = 0x100
rom char hello_str[] = "Hello!";
rom char mchp_str[] = "Microchip"; rom char fill_60[] =
"012345678901234567890123456789012345678901234567890123456789";
singlechar
Exploring the Lesson 11 Source Code with PICkit 3 Debug
Express
=
ProgMemRdAddress(0x107); //
returns 'M' from "Microchip".
© 2009 Microchip Technology Inc.