8. Special I/O Functions
Mode setting for the special I/O functions
These functions, except the analog setting function, are selected by setting data into SW16 and SW26 by user program. These registers work as mode setting registers for the special I/O functions. The data setting for these registers, i.e. mode setting for the special I/O functions, is effective only at the first scan.
Note) In the explanation below, HSC and INT mean the high speed counter and the interrupt input functions respectively.
F E D C B A 9 8 7 6 5 4 3 2 1 0
SW16
0
0 0
0 0
Bit 0 < HSC and INT master flag >
0:No use
1:Use
Bit 1 < HSC / INT selection >
0:INT
1:HSC
Bits 2 and 3 < INT No.1 mode >
00:No use (Reserve)
01:Rising (OFF to ON)
10:Falling (ON to OFF)
11:No use (Reserve)
Bits 6 and 7 < INT No.2 mode >
00:No use (Reserve)
01:Rising (OFF to ON)
10:Falling (ON to OFF)
11:No use (Reserve)
Bits A and B < HSC mode >
00:Single phase
01:Single phase
10:Quadrature
11:No use (Reserve)
Bits C and D < Enable flag for HSC / INT >
00:CH2 - disable, CH1 - disable
01:CH2 - disable, CH1 - enable
10:CH2 - enable, CH1 - disable
11:CH2 - enable, CH1 - enable
Bit F < Variable input filter constant >
0:No use (fixed to 10 ms)
1:Use
Basic Hardware and Function 269
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