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Chapter 3 CPU Control Functions
3.1 Overview ........................................................................................................ 3-1
3.2 System Reset Mode (RST) ............................................................................ 3-2
3.2.1 Transfer to and State of System Reset Mode .................................... 3-2
3.3 Halt Mode ...................................................................................................... 3-3
3.3.1 Transfer to and State of Halt Mode .................................................... 3-3
3.3.2 Halt Mode Release ............................................................................. 3-4
3.3.2.1 Release of Halt Mode by Interrupt ........................................ 3-4
3.3.2.2 Release of Halt Mode by RESETB Pin ................................. 3-4
3.3.3 Melody Data Interrupt and Halt Mode Release .................................. 3-5
3.3.4 Note Concerning HALT Instruction ..................................................... 3-5
Chapter 4 Interrupt (INT)
4.1 Overview ........................................................................................................ 4-1
4.2 Interrupt Registers ......................................................................................... 4-3
4.3 Interrupt Sequence ........................................................................................ 4-10
4.3.1 Interrupt Processing ........................................................................... 4-10
4.3.2 Return from an Interrupt Routine ........................................................ 4-11
4.3.3 Interrupt Hold Instructions .................................................................. 4-11
Chapter 5 Clock Generator Circuit (OSC)
5.1 Overview ........................................................................................................ 5-1
5.2 Clock Generator Circuit Configuration ........................................................... 5-1
5.3 Low-Speed Clock Generator Circuit .............................................................. 5-2
5.4 High-Speed Clock Generator Circuit ............................................................. 5-4
5.5 System Clock Control .................................................................................... 5-6
5.6 Frequency Control Register (FCON) ............................................................. 5-7
5.7 System Clock Select Timing .......................................................................... 5-8
Chapter 6 Time Base Counter (TBC)
6.1 Overview ........................................................................................................ 6-1
6.2 Time Base Counter Configuration ................................................................. 6-1
6.3 Time Base Counter Registers ........................................................................ 6-2
6.4 Time Base Counter Operation ....................................................................... 6-3