GL640USB-A View Datasheet(PDF) - Genesys Logic
Part Name
Description
MFG CO.
'GL640USB-A' PDF : 39 Pages View PDF
GL640USB, GL640USB-A
7. 8-BIT RISC MCU INSTRUCTION
7.1 MEMORY ORGANIZATION
The memory in the microcontroller is organized into user program memory in program ROM and
data memory in SRAM space.
Program Memory Organization
The 11-bit Program Counter (PC) is capable of addressing 2.25K x 14 of program space.
However, the program space of the GL640USB is 2K x 14. The program memory space is
divided into two functional groups: Interrupt Vectors and program code. After a reset, the
Program Counter points to location zero of the program space. After a timer interrupt, the
Program Counter points the location 0x0004 of the program space.
After Reset
→ Addres
s
0x0000 Reset Vector
After Timer
Interrupt
→ 0x0004 Timer Interrupt Vector
0x0005
2K x 14 ROM
0x07FF
Figure 7-1 Program Memory Space
Revision 1.1
-9-
Jun. 7, 1999
Share Link: 
