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................................................................................................................................... 25
5.1 Hardware Reset .........................................................................................................................................25
5.1.1 Reset on a Stable Supply Voltage .....................................................................................................25
5.1.2 Power-on Reset .................................................................................................................................25
5.2 Software Reset ..........................................................................................................................................25
5.3 Watchdog Timer Reset...............................................................................................................................25
5.4 Oscillation Stop Detection Reset ...............................................................................................................25
6. Processor Mode ..................................................................................................................28
7. Clock Generating Circuit .....................................................................................................31
7.1 Types of Clock Generating Circuit .............................................................................................................31
7.1.1 Main Clock .........................................................................................................................................39
7.1.2 Sub Clock...........................................................................................................................................40
7.1.3 On-chip Oscillator Clock ....................................................................................................................41
7.1.4 PLL Clock........................................................................................................................................... 41