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Appendix D Register-Level Programming
National Instruments Corporation D-23 PC-LPM-16/PnP User Manual
Counter Mode Register
(Continued)
3–1 M<2..0> Counter Mode Select Bits—These bits select the
counting mode of the selected counter. The following
table lists six available modes and the corresponding
bit settings. Refer to Appendix B, MSM82C53 Data
Sheet, for additional information.
0 BCD Binary Coded Decimal Select Bit—If BCD is set, the
selected counter keeps count in BCD. If BCD is
cleared, the selected counter keeps count in 16-bit
binary.
M2 M1 M0 Mode
0 0 0 Mode 0—Interrupt on
terminal count
0 0 1 Mode 1—Hardware
retriggerable one shot
0 1 0 Mode 2—Rate generator
0 1 1 Mode 3—Square wave
mode
1 0 0 Mode 4—Software
retriggerable strobe
1 0 1 Mode 5—Hardware
retriggerable strobe
a.Book : l.Appendix D Page 23 Wednesday, November 20, 1996 6:36 PM