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R5F21244SNXXXFP Datasheet(PDF) 8 Page - Renesas Technology Corp |
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R5F21244SNXXXFP Datasheet(HTML) 8 Page - Renesas Technology Corp |
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8 / 525 page  A - 1 SFR Page Reference ........................................................................................................................... B - 1 1. Overview ......................................................................................................................................... 1 1.1 Applications ............................................................................................................................................... 1 1.2 Performance Overview .............................................................................................................................. 2 1.3 Block Diagram .......................................................................................................................................... 4 1.4 Product Information .................................................................................................................................. 5 1.5 Pin Assignments ........................................................................................................................................ 9 1.6 Pin Functions ........................................................................................................................................... 11 2. Central Processing Unit (CPU) ..................................................................................................... 13 2.1 Data Registers (R0, R1, R2, and R3) ...................................................................................................... 14 2.2 Address Registers (A0 and A1) ............................................................................................................... 14 2.3 Frame Base Register (FB) ....................................................................................................................... 14 2.4 Interrupt Table Register (INTB) .............................................................................................................. 14 2.5 Program Counter (PC) ............................................................................................................................. 14 2.6 User Stack Pointer (USP) and Interrupt Stack Pointer (ISP) .................................................................. 14 2.7 Static Base Register (SB) ........................................................................................................................ 14 2.8 Flag Register (FLG) ................................................................................................................................ 14 2.8.1 Carry Flag (C) ..................................................................................................................................... 14 2.8.2 Debug Flag (D) ................................................................................................................................... 14 2.8.3 Zero Flag (Z) ....................................................................................................................................... 14 2.8.4 Sign Flag (S) ....................................................................................................................................... 14 2.8.5 Register Bank Select Flag (B) ............................................................................................................ 14 2.8.6 Overflow Flag (O) .............................................................................................................................. 14 2.8.7 Interrupt Enable Flag (I) ..................................................................................................................... 15 2.8.8 Stack Pointer Select Flag (U) .............................................................................................................. 15 2.8.9 Processor Interrupt Priority Level (IPL) ............................................................................................. 15 2.8.10 Reserved Bit ........................................................................................................................................ 15 3. Memory ......................................................................................................................................... 16 3.1 R8C/24 Group ......................................................................................................................................... 16 3.2 R8C/25 Group ......................................................................................................................................... 17 4. Special Function Registers (SFRs) ............................................................................................... 18 5. Resets ........................................................................................................................................... 25 5.1 Hardware Reset ....................................................................................................................................... 28 5.1.1 When Power Supply is Stable ............................................................................................................. 28 5.1.2 Power On ............................................................................................................................................ 28 5.2 Power-On Reset Function ....................................................................................................................... 30 5.3 Voltage Monitor 0 Reset ......................................................................................................................... 31 5.4 Voltage Monitor 1 Reset ......................................................................................................................... 31 5.5 Voltage Monitor 2 Reset ......................................................................................................................... 31 5.6 Watchdog Timer Reset ............................................................................................................................ 32 5.7 Software Reset ......................................................................................................................................... 32 6. Voltage Detection Circuit .............................................................................................................. 33 6.1 VCC Input Voltage .................................................................................................................................. 40 Table of Contents |
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