PIC18F45K20-E/P Microchip Technology, PIC18F45K20-E/P Datasheet - Page 70

• Manufacturer Part Number: PIC18F45K20-E/P
• Description: 32KB, Flash, 1536bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 PDIP .600in TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F45K20-E/P

• 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: 40-DIP (0.600", 15.24mm)
• 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 PIC18F4XK20
• 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.