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FS98O22 Datasheet(PDF) 21 Page - Fortune Semiconductor Corp. |
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FS98O22 Datasheet(HTML) 21 Page - Fortune Semiconductor Corp. |
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21 / 146 page  FS98O22 Rev. 1.6 21/146 3. Memory Organization 3.1. Program Memory Structure FS98O22 has an 12bits Program Counter which is capable of addressing a 4k x 16bits program memory space and a 8 level depth 12bits Stack Register. The Start up/Reset Vector is at 0x0000H. When FS98O22 is started or its program is reset, the Program Counter will point to Reset Vector. The Interrupt Vector is at 0x0004H. No matter what ISR is processed, the Program Counter will point to Interrupt Vector. Please see Figure 3-1. Figure 3-1 FS98O22 program memory structure 3.2. Data Memory Structure FS98O22 has 384-byte Data Memory. The data memory is partitioned into three parts. The area with address 00h~07h is reserved for system special registers, such as indirect address, indirect address pointer, status register, working register, interrupt flag, interrupt control register. The address 08h~7Fh areas are peripheral special registers, such as I/O ports, timer, ADC, signal conditional network control register, LCD driver. The address 80h~17Fh areas are SRAM for general data memory. Please see Table 3-1. Table 3-1 FS98O22 Data memory structure Start Address End Address Data Memory 0X00H 0X07H System Special Registers 0X08H 0X7FH Peripheral Special Registers 0X80H 0X17FH General Data Memory(256 bytes) |
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