Remote Processing RPC-2350 - Manual (Page 61)

MULTI-MODE COUNTER CHAPTER 14
14-6
Signal levels are all TTL logic (0 to 5V).
The following signals at J10 ar e used to measur e pulse
widths:
J10 pin Description
4 Counter gate. Measures when low.
7 4.608 M HZ clock output. Tie to J10-9
9 Clock input. Tie to J10-7
The L S7166 IC R registe r is pro gram med so inp ut A
(J10-9) is up cou nt input and G ATE input (J10-9) ac ts to
enable inputs A/B when low.
If desired, LO AD input (J10-6) can be used to reset the
counter . If this is de sired, make su re the O L reg ister is
program med for 0.
See the demonstration program CNTR6.BAS for a
working example.
Basic operation is a follows:
Set the counter to 0
Read the counter and wait until it stops changing
after it star ts
Read the counter
Multiply result by 2.170139E-7
The result is the actual time.
J10 Pin out
The following is the pin out for J10.
J10
pin
Function
1 Ground
2 4.608 M HZ clock output
3 Sound output
4 Gate input
5 + 5V
6 Load counter
7 INT 1 input
8 B counter input
9 A counter input
10 High voltage input
COMMANDS
The following commands ar e used with the multi-mode
counter.
Command Function
COU NT(8) Reads multi-mode counter
ON ITR 1 Interrupt tasking
I N P I/O port read
O U T Write to I/O port