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18.1 EPROM mode ..................................................................................................................... 18-3
18.1.1 Pin description ........................................................................................................... 18-3
18.1.2 Programming/reading to/from built-in PROM .......................................................... 18-4
18.1.3 Programming algorithm of built-in PROM ............................................................... 18-7
18.1.4 Electrical characteristics of programming algorithm .............................................. 18-9
18.2 Usage precaution ............................................................................................................ 18-10
18.2.1 Precautions on all PROM versions ....................................................................... 18-10
18.2.2 Precautions on one time PROM version .............................................................. 18-11
18.2.3 Precautions on EPROM version ............................................................................ 18-11
19.1 Parallel input/output mode ............................................................................................. 19-3
19.1.1 Pin description ........................................................................................................... 19-4
19.1.2 Access to built-in flash memory ............................................................................. 19-5
19.1.3 Read-only mode ........................................................................................................ 19-7
19.1.4 Read/write (software command control) mode ...................................................... 19-9
19.1.5 Electrical characteristics ......................................................................................... 19-18
19.1.6 Program/erase algorithm flow chart ...................................................................... 19-20
19.2 Serial input/output mode ............................................................................................... 19-21
19.2.1 Pin description ......................................................................................................... 19-21
19.2.2 Access to built-in flash memory ........................................................................... 19-23
19.2.3 Electrical characteristics ......................................................................................... 19-31
19.2.4 Program algorithm flow chart ................................................................................. 19-33
Appendix 1. Memory assignment ........................................................................................... 20-2
Appendix 2. Memory assignment in SFR area ................................................................... 20-5
Appendix 3. Control registers ................................................................................................. 20-9
Appendix 4. Package outlines .............................................................................................. 20-32
Appendix 5. Example for processing unused pins .......................................................... 20-34
Appendix 6. Hexadecimal instruction code table ............................................................. 20-37
Appendix 7. Machine instructions ....................................................................................... 20-40
Appendix 8. Examples of noise immunity improvement ................................................ 20-61
7751 Group User's Manual
Table of Contents
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