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FS98O21 Datasheet(PDF) 22 Page - Fortune Semiconductor Corp. |
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FS98O21 Datasheet(HTML) 22 Page - Fortune Semiconductor Corp. |
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22 / 136 page  FS98O21 Rev. 1.7 22/136 System Special Registers The System Special Registers are designed to complete CPU Core functions, and consists of indirect address, indirect address pointer, status register, work register, interrupt flag, and interrupt control register. Please see Section 1.11 for related CPU work flow chart. Table 3-2 system register table Address Name Referenced Section Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Value on Power on Reset 1 00h IND0 3.427 Use contents of FSR0 to address data memory uuuuuuuu 01h IND1 3.4.1 Use contents of FSR1 to address data memory uuuuuuuu 02h FSR0 1.11/3.4.1 Indirect data memory address pointer 0 uuuuuuuu 03h FSR1 1.11/3.4.1 Indirect data memory address pointer 1 uuuuuuuu 04h STATUS 1.11/3.4.2 PD TO DC C Z 00u00uuu 05h WORK 1.11 WORK register uuuuuuuu 06h INTF 3/6/7/9/10/11 TMI F I2CI F ADI F E1IF E0IF 00000000 07h INTE 3/6/7/9/10/11 GIE TMI E I2CI E ADI E E1IE E0IE 00000000 3..1 Special Register Contents after External Reset (Power On Reset) and WDT Reset Table 3-3 special register reset table Register Address Register Name Register Content External Reset WDT Reset 04h STATUS 00u00uuu uuuu1uuu 0Dh WDTCON 00000000 uuuuuuuu 20h PT1 00000000 uuuuuuuu 21h PT1EN 00000000 uuuuuuuu 22h PT1PU 00000000 uuuuuuuu 23h AIENB1 00000000 uuuuuuuu 24h PT2 00000000 uuuuuuuu 25h PT2EN 00000000 uuuuuuuu 26h PT2PU 00000000 uuuuuuuu 27h PT2MR 00000000 uuuuuuuu 37h PT2OC uuu11uuu uuuuuuuu 57h I2CCON 0001uuuu uuuuuuuu 58h STA uu0000u0 uuuuuuuu 59h I2CADD 00000000 uuuuuuuu 5Ah I2CBUF 00000000 uuuuuuuu 1 u mean unknown or unchanged |
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