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GL640USB Datasheet(PDF) 10 Page - List of Unclassifed Manufacturers |
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GL640USB Datasheet(HTML) 10 Page - List of Unclassifed Manufacturers |
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10 / 39 page  Revision 1.1 Jun. 7, 1999 -9- GL640USB, GL640USB-A 7 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 0x07FF 2K x 14 ROM Figure 7-1 Program Memory Space |
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