DM6814 Hardware Manual - RTD Embedded Technologies, Inc.
DM6814 Hardware Manual - RTD Embedded Technologies, Inc.
DM6814 Hardware Manual - RTD Embedded Technologies, Inc.
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Table 1-1 Factory Settings<br />
Switch/<br />
Jumper<br />
Function Controlled<br />
Factory Settings<br />
(Jumpers Installed)<br />
P4<br />
Connects a P14 jumper selectable interrupt source<br />
to an interrupt channel; pulls tri-state buffers to<br />
ground (G) for multiple interrupt applications<br />
Jumper installed on G (ground for<br />
buffer); interrupt channels<br />
disabled<br />
P5<br />
Sets the clock and gate sources for the 8254<br />
timer/counter<br />
CLK0: OSC; CLK1: OT0<br />
CLK2:OT1; GT2:EG2<br />
(timer/counters cascaded)<br />
P7<br />
Activates pull-up/ pull-down resistors on Port 0<br />
digital I/O lines (Port 0, lines 0-3 only)<br />
Not Installed<br />
P8<br />
Activates pull-up/ pull-down resistors on Port 1<br />
digital I/O lines (Port 1, lines 0-3 only)<br />
Not Installed<br />
P9<br />
Activates pull-up/ pull-down resistors on Port 2<br />
digital I/O lines (Port 2, lines 0-3 only)<br />
Not Installed<br />
P10<br />
Activates pull-up/ pull-down resistors on Port 3<br />
digital I/O lines (Port 3, lines 0-3 only)<br />
Not Installed<br />
P11<br />
Activates pull-up/ pull-down resistors on Port 4<br />
digital I/O lines (Port 4, lines 0-3 only)<br />
Not Installed<br />
P12<br />
Activates pull-up/ pull-down resistors on Port 5<br />
digital I/O lines (Port 5, lines 0-3 only)<br />
Not Installed<br />
P13 Not used No Connection<br />
P14<br />
Selects one of four interrupt sources for interrupt<br />
generation<br />
OT2<br />
P16<br />
Connects interrupt source jumpered on P14 to an<br />
AT interrupt channel (<strong>DM6814</strong> only)<br />
no jumper<br />
S1 Sets the base address 300 hex (768 decimal)
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