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PCM-3780 User Manual viii
3.6.2 Using Direct I/O ........................................................... 24
Figure 3.5:Frequency Measurement ............................ 24
Appendix A Specifications ................................................. 26
A.1 Programmable Counter ................................................... 26
A.2 Digital Input/Output ........................................................ 26
A.3 General ............................................................................ 27
Appendix B Block Diagram............................................... 30
Appendix C Register Structure & Format....................... 32
C.1 Overview ......................................................................... 32
C.2 I/O Port Address Map ..................................................... 32
C.2.1 Register Format ............................................................ 33
Table C.1:Register Offset Address Table .................... 33
C.3 Counter 0/1 Mode Register ............................................. 35
C.4 Counter 0/1 Load Register: ............................................. 37
C.5 Counter 0/1 Hold Register............................................... 37
C.6 Counter 0/1 Command Register...................................... 38
C.7 Counter Command Enable Register................................ 38
C.8 Interrupt Control Register ............................................... 39
C.9 Interrupt Status Register.................................................. 39
C.10 Interrupt Clear Register................................................... 40
C.11 I/O Direction Control Register........................................ 40
C.12 Port A/B/C Interrupt Status Register............................... 40
C.13 FOUT Register ................................................................ 41
Appendix D Waveform of Each Mode.............................. 44
D.1 Counter Mode Descriptions ............................................ 44
Table D.1:PCM-3780 Counter Mode .......................... 45
Table D.2:PCM-3780 Counter Mode .......................... 46
D.2 Mode A Waveforms........................................................ 47
D.3 Mode B Waveforms ....................................................... 48
D.4 Mode C Waveforms ........................................................ 49
D.5 Mode D Waveforms ....................................................... 50
D.6 Mode E Waveforms ........................................................ 51
D.7 Mode F Waveforms ........................................................ 52
D.8 Mode G Waveforms........................................................ 53
D.9 Mode H Waveforms........................................................ 54
D.10 Mode I Waveforms.......................................................... 55
D.11 Mode J Waveforms ......................................................... 56
D.12 Mode K Waveforms........................................................ 57
D.13 Mode L Waveforms ........................................................ 58
D.14 Mode O Waveforms ....................................................... 59
D.15 Mode R Waveforms ........................................................ 60
D.16 Mode U Waveforms........................................................ 61
D.17 Mode X Waveforms ....................................................... 62