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A-1
Table of Contents
SFR Page Reference ............................................................................................................ B-1
1. Overview ............................................................................................................................... 1
1.1 Applications ..................................................................................................................................................1
1.2 Performance Outline ....................................................................................................................................2
1.3 Block Diagram ..............................................................................................................................................4
1.4 Product List ..................................................................................................................................................5
1.5 Pin Configuration .........................................................................................................................................6
1.6 Pin Description ............................................................................................................................................. 8
2. Central Processing Unit (CPU) ........................................................................................... 10
2.1 Data Registers (R0, R1, R2, and R3) ........................................................................................................10
2.2 Address Registers (A0 and A1) ..................................................................................................................10
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), Interrupt Stack Pointer (ISP) ........................................................................... 11
2.7 Static Base Register (SB) .......................................................................................................................... 11
2.8 Flag Register (FLG) ................................................................................................................................... 11
2.8.1 Carry Flag (C Flag) ............................................................................................................................ 11
2.8.2 Debug Flag (D Flag) .......................................................................................................................... 11
2.8.3 Zero Flag (Z Flag) .............................................................................................................................. 11
2.8.4 Sign Flag (S Flag) .............................................................................................................................. 11
2.8.5 Register Bank Select Flag (B Flag).................................................................................................... 11
2.8.6 Overflow Flag (O Flag)....................................................................................................................... 11
2.8.7 Interrupt Enable Flag (I Flag) ............................................................................................................. 11
2.8.8 Stack Pointer Select Flag (U Flag)..................................................................................................... 11
2.8.9 Processor Interrupt Priority Level (IPL) .............................................................................................. 11
2.8.10 Reserved Area ................................................................................................................................. 11
3. Memory ............................................................................................................................... 12
4. Special Function Register (SFR)......................................................................................... 13
5. Reset ................................................................................................................................... 29
5.1 Hardware Reset .........................................................................................................................................29
5.1.1 Reset on a Stable Supply Voltage .....................................................................................................29
5.1.2 Power-on Reset .................................................................................................................................29
5.2 Software Reset ..........................................................................................................................................29
5.3 Watchdog Timer Reset...............................................................................................................................29
5.4 Oscillation Stop Detection Reset ............................................................................................................... 29
6. Processor Mode .................................................................................................................. 32
7. Clock Generating Circuit .....................................................................................................35
7.1 Types of Clock Generating Circuit ............................................................................................................. 35
7.1.1 Main Clock .........................................................................................................................................43
7.1.2 Sub Clock...........................................................................................................................................44
7.1.3 On-chip Oscillator Clock ....................................................................................................................45
7.1.4 PLL Clock ...........................................................................................................................................45