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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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MPC82L52 Fiches technique(PDF) 21 Page - Megawin Technology Co., Ltd |
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MPC82L52 Fiches technique(HTML) 21 Page - Megawin Technology Co., Ltd |
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21 / 144 page  MEGAWIN MPC82x52 Data Sheet 21 Figure 6 –4 gives a brief look at the Special Function Register (SFR) space. SFRs include the Port latches, timers, peripheral controls, etc. These registers can only be accessed by direct addressing. Sixteen addresses in SFR space are both byte- and bit-addressable. The bit-addressable SFRs are those whose address ends in 0H or 8H. Figure 6 –2. Data Memory Upper 128 Bytes Internal 256 Bytes SRAM Addressable by Indirect Addressing Only Addressable by Direct and Indirect Addressing Lower 128 Bytes Addressable by Direct Addressing (SFRs) SFRs 00H 7FH 80H FFH FFH 80H Figure 6 –3. Lower 128 Bytes of Internal RAM Bank 0 Lower 128 Bytes of internal SRAM Bank 1 Bank 2 Bank 3 Bit Addressable 00H 08H 10H 18H 20H 07H 0FH 17H 1FH 2FH 7FH 30H Reset value of Stack Pointer Four banks of 8 registers R0~R7 |
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