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R28 Datasheet(PDF) 10 Page - Renesas Technology Corp |
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R28 Datasheet(HTML) 10 Page - Renesas Technology Corp |
10 / 473 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 ........................................................................................................................................ 7 1.6 Pin Functions ............................................................................................................................................. 8 2. Central Processing Unit (CPU) ..................................................................................................... 10 2.1 Data Registers (R0, R1, R2, and R3) ...................................................................................................... 11 2.2 Address Registers (A0 and A1) ............................................................................................................... 11 2.3 Frame Base Register (FB) ....................................................................................................................... 11 2.4 Interrupt Table Register (INTB) .............................................................................................................. 11 2.5 Program Counter (PC) ............................................................................................................................. 11 2.6 User Stack Pointer (USP) and Interrupt Stack Pointer (ISP) .................................................................. 11 2.7 Static Base Register (SB) ........................................................................................................................ 11 2.8 Flag Register (FLG) ................................................................................................................................ 11 2.8.1 Carry Flag (C) ..................................................................................................................................... 11 2.8.2 Debug Flag (D) ................................................................................................................................... 11 2.8.3 Zero Flag (Z) ....................................................................................................................................... 11 2.8.4 Sign Flag (S) ....................................................................................................................................... 11 2.8.5 Register Bank Select Flag (B) ............................................................................................................ 11 2.8.6 Overflow Flag (O) .............................................................................................................................. 11 2.8.7 Interrupt Enable Flag (I) ..................................................................................................................... 12 2.8.8 Stack Pointer Select Flag (U) .............................................................................................................. 12 2.8.9 Processor Interrupt Priority Level (IPL) ............................................................................................. 12 2.8.10 Reserved Bit ........................................................................................................................................ 12 3. Memory ......................................................................................................................................... 13 3.1 R8C/28 Group ......................................................................................................................................... 13 3.2 R8C/29 Group ......................................................................................................................................... 14 4. Special Function Registers (SFRs) ............................................................................................... 15 5. Resets ........................................................................................................................................... 22 5.1 Hardware Reset ....................................................................................................................................... 26 5.1.1 When Power Supply is Stable ............................................................................................................. 26 5.1.2 Power On ............................................................................................................................................ 26 5.2 Power-On Reset Function ....................................................................................................................... 28 5.3 Voltage Monitor 0 Reset (N, D Version) ................................................................................................ 30 5.4 Voltage Monitor 1 Reset (N, D Version) ................................................................................................ 30 5.5 Voltage Monitor 1 Reset (J, K Version) .................................................................................................. 30 5.6 Voltage Monitor 2 Reset ......................................................................................................................... 31 5.7 Watchdog Timer Reset ............................................................................................................................ 31 5.8 Software Reset ......................................................................................................................................... 31 Table of Contents |
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