Cooper Instruments & Systems DFI INFINITY Digital Force Indicator/Controller - Manual (Page 65)

13.5 Selecting The Source Of BCD Data: “OUT .CNF”
If “L3C.7=0” has been selected to unlock the Output Configuration byte, set “OUT.3=1” to send data to this BCD
board. “OUT.4=0” selects that data as the DISPLAYED (current) measurement value. “OUT.4=1” sends the PEAK
(HI) value to the BCD. Save your selection by pressing the ‘MENU’ button.
13.6 Hold Control
P8-U17 is the HOLD line, referenced to the same ground as the BCD outputs (on P8-L15 and P8-L3). Pulling this
line low freezes the BCD outputs (useful for a slow reading device or asymmetric cable delays). When released, all
6 digits of the BCD data are updated together.
13.7 Data Ready Timing Pulses
The tri-state BCD outputs are always valid (to within a few nanoseconds; a single update pulse controls all the
digits).
To generate a timing marker, P8-L16, DATA READY, goes active low for approximately 200 microseconds at the
time of each BCD update. The polarity of this line is NOT CHANGED by S8, the data polarity control jumper.
13.8 Bringing Out The BCD Overflow Line
P8-U18 can be used for BCD OVERFLOW by inserting jumper S1A. If this line is used for another purpose by
some other equipment on the BCD bus, remove this jumper.
13.9 3 Digit At A Time Multiplex
When jumpers S2A, S3A, and S4A are used, P8-L20 and S5C control when the upper 3 digits of the 6-digit BCD
value appear on the output line (P8-U9 through P8-L14).
With jumper S5C, a LOW level on P8-L20 activates those upper 3 digit outputs; a high or open level disables those
digits.
With jumper S5C removed, a high or open level on P8-L20 enables those upper 3 digits and a low level disables
them.
When the upper 3 digits are NOT enabled, the lower 3 digits can be enabled in just the same way by jumper S5A
and P8-U20, and they now appear on the same 12 lines.
13.10 6 Digit At A Time Card Address
Jumpers S2A and S4A are removed for full parallel (6-digit output).
If jumper S3A is installed, the outputs are enabled by line P8-L20 ALONE: a low level enables the outputs when
jumper S5C is installed, and a high or open level does the job if S5C is removed.
When jumper S3A is removed, the outputs are enabled only when the selected 4-line address is applied to P8-U19,
L19, U20 and L20. Each of these four is exclusive-OR’d with its jumper, and the following four outputs are AND’d
to create a 1 of 16 enable code.
If jumper S5A is installed, P8-U20 must be LOW to enable the card (BIT 2).
If jumper S5C is installed, P8-L20 must be LOW to enable the card (BIT 1).
If jumper S5E is installed, P8-U19 must be LOW to enable the card (BIT 8).
If jumper S5G is installed, P8-L19 must be LOW to complete enabling the card outputs (BIT 4).
CF 67 60 M1291/N/0403 11279ML-02 Rev. A