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7721 Datasheet(PDF) 25 Page - Renesas Technology Corp |
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7721 Datasheet(HTML) 25 Page - Renesas Technology Corp |
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25 / 577 page  CENTRAL PROCESSING UNIT (CPU) 2.1 Central processing unit 2–2 7721 Group User’s Manual 2.1 Central processing unit The CPU (Central Processing Unit) has the ten registers as shown in Figure 2.1.1. Fig. 2.1.1 CPU registers structure b0 b7 b8 b15 AH AL b0 b7 b8 b15 BH BL b0 b7 b8 b15 XH XL b0 b7 b8 b15 YH YL b0 b7 b8 b15 SH SL b0 b7 b8 b15 b7 b0 b8 b23 b16 b15 b7 b0 PCH PCL PG b0 b7 DT b0 b7 b8 b15 b0 b1 b2 b3 b4 b5 b6 b7 b8 b10 000 00 C Z I D x m V N IPL Accumulator A (A) Accumulator B (B) Index register X (X) Index register Y (Y) Stack pointer (S) Data bank register (DT) Program counter (PC) Program bank register (PG) Direct page register (DPR) Processor status register (PS) Processor interrupt priority level Carry flag Zero flag Interrupt disable flag Index register length flag Decimal mode flag Data length flag Overflow flag Negative flag DPRL DPRH PSL PSH b15 |
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