UPD17708 datasheet(8/356 Pages) NEC

8 / 356 page

µPD17704, 17705, 17707, 17708, 17709

ALU (Arithmetic Logic Unit) BLOCK .............................................................................................58

7.1

Outline of ALU Block .......................................................................................................... 58

7.2

Configuration and Function of Each Block .......................................................................

7.3

ALU Processing Instruction List ......................................................................................... 59

7.4

Cautions on Using ALU ....................................................................................................... 63

8. REGISTER FILE (RF) ........................................................................................................................ 64

8.1

Outline of Register File ........................................................................................................ 64

8.2

Configuration and Function of Register File ....................................................................

8.3

Control Registers ................................................................................................................. 66

8.4

Port Input/Output Selection Registers ..............................................................................

8.5

Cautions on Using Register File ......................................................................................... 84

9. DATA BUFFER (DBF) ....................................................................................................................... 85

9.1

Outline of Data Buffer .......................................................................................................... 85

9.2

Data Buffer ............................................................................................................................ 86

9.3

Relationships between Peripheral Hardware and Data Buffer ........................................

9.4

Cautions on Using Data Buffer ........................................................................................... 90

10. DATA BUFFER STACK ................................................................................................................... 91

10.1

Outline of Data Buffer Stack ................................................................................................91

10.2

Data Buffer Stack Register ..................................................................................................91

10.3

Data Buffer Stack Pointer .................................................................................................... 93

10.4

Operation of Data Buffer Stack ........................................................................................... 94

10.5

Using Data Buffer Stack ...................................................................................................... 95

10.6

Cautions on Using Data Buffer Stack ................................................................................

11. GENERAL-PURPOSE PORT ........................................................................................................... 96

11.1

Outline of General-purpose Port ......................................................................................... 96

11.2

General-Purpose I/O Port (P0A, P0B, P0C, P1D, P2A, P2B, P2C, P2D, P3A, P3B,

P3C, P3D) .............................................................................................................................. 99

11.3

General-Purpose Input Port (P0D, P1A, P1C) ................................................................... 113

11.4

General-Purpose Output Port (P1B) .................................................................................. 116

12. INTERRUPT ..................................................................................................................................... 117

12.1

Outline of Interrupt Block .................................................................................................... 117

12.2

Interrupt Control Block ........................................................................................................ 119

12.3

Interrupt Stack Register ....................................................................................................... 133

12.4

Stack Pointer, Address Stack Registers, and Program Counter .................................... 137

12.5

Interrupt Enable Flip-Flop (INTE) ........................................................................................ 137

12.6

Accepting Interrupt .............................................................................................................. 138

12.7

Operations after Interrupt Has Been Accepted ................................................................ 143

12.8

Returning from Interrupt Routine ....................................................................................... 143

12.9

External Interrupts (CE and INT0 through INT4 pins) ...................................................... 144

12.10 Internal Interrupts ................................................................................................................ 147

13. TIMERS ............................................................................................................................................ 148

13.1

Outline of Timers .................................................................................................................. 148

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