1. PICAXE Memory

2. Three Types
Program
RAM
Data

3. Program Memory Stores the program as a series of commands
Executed one command at a time
Permanent, will remember for 10 years without power
Accessed with the PICAXE Editor
The program doesn’t normally store data here

4. Random Access Memory Divided into bytes (B0 to B27)
Each byte is 8 bits wide (each stores up to 255)
Can be accessed in different sizes
Accessed by the program
Battery operated, lose power – lose data
Used for math and to access the outside world

5. Data 256 bytes of memory for storing data
Each byte has an address,
Permanent, will remember for ten years without power
Accessed by the program

6. Accessing RAM
If B1 = 2
B2 = 2
B3 = “a”
READADC C.1,B4

7. Accessing Data
WRITE 12,200
WRITE B0,201
WRITE “A”,202
READ 200,B0

8. PICAXE Memory Map