Kantronics KPC–3 Plus User Manual page 219

pin 9 is connected to the reset circuit. This allows you to perform a soft reset by
applying a momentary ground to pin 9. Default: ground.
J6: (Reset/input) This three-pin jumper, in conjunction with jumper J5 or J7 provides an
alternate means to supply dc power to the unit or to perform a reset without powering
down the unit. See the section on Connector Configuration for more details. Default: not
connected.
J7: (Serial Configuration) This three-pin jumper, in conjunction with J6, provides an
alternative means to supply dc power to the unit or to perform a reset without powering
down the unit. See the ―Optional Connections‖ section for more details.
Default: center pin and pin 2.
J8: (analog input AN0) When on center pin and pin 1, selects input from DSUB-9 pin 4.
When placed on center pin and pin 2, selects input from DSUB-25 pin 18.
J9: (NOR/HT) When placed on the center pin and the pin marked NOR, this configures
the AFSK output line for use with base station radios. When placed on the center pin
and the pin marked HT, this configures the AFSK output line to also serve as the PTT
line for HT radios. Default: NOR.
J10: (Analog input AN1) When on center pin and pin 1, selects input from DSUB-9 pin
8. When placed on center pin and pin 2, selects input from DSUB-25 pin 11.
J11: (Reset Jumper) When on one pin no action occurs. When placed on both pins
(after turning unit power off), the processor will perform a ―hard‖ reset (and internal self-
test) once power is turned back on. All command parameters will be set to factory
default values. Default: not connected.
J12: (PTT watchdog) This jumper enables/disables the PTT watchdog timer. When
placed on one pin, the watchdog timer is active; when placed on both pins, the timer is
disabled. Default: enabled.
J13: (ROM size) This three-pin jumper permits the installation of different size ROMS.
When placed on the center pin and 1, ROMs up to/including 1 megabits may be
installed. When placed on the center pin and 2, ROM sizes 1 megabits and above can
be installed. Default: 1 megabit and above.
J14: (RAM size) This three-pin jumper allows the installation of various size static
RAMs. When placed on the center pin and pin 1, the KPC-3 Plus can accept 32 kbyte or
128 kbyte static RAM. When placed on the center pin and 2, the unit accepts a 512
kbyte static RAM. Default 32K/128K. (does not apply in SMT version, 512K is the
default RAM size)
J16: (Power supply) Internal regulator voltage select (5 V/3.3 V) Default 5 V. For details,
see the section in this appendix on very low power operation.
J17: MX fulldup option. (does not apply in SMT version)
J18: MX fulldup option. (does not apply in SMT version)
219