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GL640USB 数据表(PDF) 10 Page - List of Unclassifed Manufacturers

部件名 GL640USB
功能描述  IEEE-1284 to USB Bridge
PDF  39 Pages
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制造商  ETC [List of Unclassifed Manufacturers]
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标志 ETC - List of Unclassifed Manufacturers

GL640USB 数据表(HTML) 10 Page - List of Unclassifed Manufacturers

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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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