Teledyne PC-AT 200 User Manual

Active Extenders

MODELS PC/AT150 & PC/AT200

Hot Swap PC/AT Bus Extender Boards

User Manual

Revision 8.1

March 30, 1999

Catalyst

Enterprises, Inc.

1439 Torrington Court

San Jose, CA 95120

[phone]

Fax: [phone]

Email [e-mail]

© 1996-1997

CONTENTS

INTRODUCTION

INSTALLATION

OPERATION

ON-OFF 2
POWER-ON RESET 2
BANK SWITCHES 2
CURRENT MEASUREMENT 3
CURRENT LIMIT CIRCUITRY 3
EXTERNAL POWER SUPPLY 3

AUXILIARY OUTPUT VOLTAGES
SOFTWARE COMMANDS 5
SOFTWARE EXAMPLES 6

AUXILIARY PINOUT

HEADERS 7
ADDITIONAL JUMPERS 8
JP 6 PINOUT 8

MODEL PC/AT200

1

1

4

8

SPECIFICATIONS

9

1

INTRODUCTION

These Active Extenders allow insertion or removal of the UUT into any PC/AT
bus without having to turn the system Off and On. This feature eliminates
repeated system power cycling and rebooting. Therefore speeds up rework,
characterization and test of UUT in the development phase as well as production
testing. The elimination of the repeated power cycling also helps prolonging
the system life and the hard disc operation. These Active Extenders use a new
CMOS technology for switching the signals on and off. These switches have a
very fast propagation delay, typically about 250 picoseconds, resulting in no
timing degradation between the bus and the UUT. The switches are also
bidirectional allowing the entire address range to be supported without any
jumper setting or running a background software to use the board.

These Active Extender boards isolate all signals and voltages to the UUT
when the On-Off switch is in the Off position. All voltages are ramped down
and ramped up during the power down and power up to eliminate any spikes.
During the power down the signals to the bus become isolated as soon as the
main supply, +5V, reaches down to +3.7V and during the power up the signals
stay isolated until the main voltage is at least +3.7V.

These Active Extenders also allow voltage margin testing of the UUT by
allowing external power supplies to replace the bus supplies as the inputs to
the UUT.

An on-board current-to-voltage converter for the main supply, +5V, allows
current measurement of the +5V at any time, using just a voltmeter at the J5
test points. The maximum current draw for the +5V supply is set to 5 Amp at
the
factory.

INSTALLATION

To install the Active Extender, make sure to turn the PC power off. Insert
the Active Extender in any available slot and secure it's bracket to the main
chassis. You are now ready to use your new extender board.

NOTE: If you are planning to use software to control the board, the On-Off

switch must be in the Off position and the dip switches must be in the OPEN
position, otherwise, all of the switches on the dip switch must be in the
CLOSED
position.

NOTE: The software command is disabled at the factory by not having the
JP16 installed. To enable the software command operation please install JP16.

2

OPERATION

Using these Active Extender boards is no different than using a regular
extender board. However, the extra features that these boards have to offer,
are explained below:

ON-OFF

To insert or remove any UUT into and out of the Active Extender, make
sure that the Active Extender is turned Off, if the PC power is to stay
on. There are three ways to turn the Active Extender power On and Off.

1) The mechanical toggle switch. 2) External control signal connected to
JP8. 3) By software commands (see details in that section).

External control can be used if remote controlling is desired for turning
the power On and Off. Leave the mechanical switch in the Off position,
then use a CMOS or TTL level signal to control turning the power On, via
JP8. The left connector of JP8 is ground and the right connector is the
control signal. A Low level, less than 1.5V will turn the switch On.

When the power is turned Off, +5V to the UUT becomes less than 3.7V, all
signals become isolated between the bus and the UUT.

NOTE: If you are running software that relies on a response from the
UUT, do not turn Off the Active Extender board, unless the handshaking
has taken place. Otherwise you may experience a system hang-up. It may
be a good practice to stop the software from running, before isolating
the power and the signals to the UUT.

POWER-ON RESET

Each time the Active Extender board is turned Off and then On, a reset
signal will be generated from the extender to the UUT automatically. The
duration of this reset is about 180 milliseconds. The reset to the UUT
is also activated every time there is a reset from the bus.

BANK SWITCHES

In a normal operation, the bank switches should be left in the closed
position. In this case when the power to the extender is turned On, all
of the bus signals will be active to and from the UUT. However, when
there is a problem with the signals from the UUT, the signals can be
activated in a smaller group. The bank switch 1 (switch closest to the
Red LED D2) controls U1 (bus signals A1-A10), bank switch 2 (second
switch closest to the RED LED D2) controls U2 (bus signals A11-A20).
Therefore bank switches 1-5 control signals on the A side and the bank
switches 6-10 control the signals on the B side. Switch numbers 1-10
correspond on a one-to-one to U1 - U10.

3

NOTE: These switches can also be controlled by software. In this case
the switches on the dip switch must be in the open position and the
software will control the open and closure of the switches. See the
software commands section for more details.

CURRENT MEASUREMENT

To measure the current being drawn by the UUT, just connect a voltmeter
to J5, polarity should be as shown on the board. Every Volt read by the
meter represent 1 Amp. So if the voltmeter reads 0.35, it represents
that the UUT is drawing 350 milliampere of current from +5V supply.

CURRENT LIMIT CIRCUITRY

Red LED's, when illuminated, indicate shorts or a very low voltage at the
output for their corresponding voltages. Green LED's when illuminated,
indicate voltages at their corresponding outputs. In the case of the +5V
short, from the UUT, the Active Extender will automatically switch the
current limit down to about 200 milliamperes and will continue to deliver
this current for troubleshooting purposes. In the case of shorts or
excessive current draw for the other voltages (-5V, +/-12V), the
resetable fuses will open up until the problem is corrected.

The current limit value for the +5V is set to 5 Amps with JP9 not
installed and 1 Amp with JP9 installed. Consult the factory for current
requirement other than 5 Amps.

EXTERNAL POWER SUPPLY

J6 or JP5 terminals can be used for the external power supply input. J6
is used with a ribbon cable for ease of interconnecting (see the pinout
on page 8). However, remember never to connect any other supply to these
inputs so long as you have JP1, JP2, JP3 and JP4 installed. In case you
want to use the external supply as an input you must remove these 4
jumpers in order not to cause any conflict with the bus voltages. These
jumpers are, however, independent from each other. For instance if you
would want to bring in only a +5V from the external supply and continue
to use the bus voltages for +12V and -12V and -5V, you would only need to
remove JP4.

4

The list below identifies which jumper is for which supply:

JP1 = +12V
JP2 = -12V
JP3 = -5V
JP4 = +5V

The following diagram indicates the interconnections of the UUT voltages

to the bus voltages and the external voltages.

+5VE to UUT, +5BV

On-Off
Circuitry Auxiliary outputs

+5BV

JP4

Auxiliary Outputs, +5V

+5V (from the Bus)

As indicated in the diagram, there will be a conflict if the external

supply is connected while the jumper is still in place. This circuit is

repeated for each of the 4 voltages.

If you are using external power supplies do not forget to connect the

Ground (GND) signals. If your external power supply outputs are not

isolated, make sure the ground of the PC (containing the extender board)

and the ground of the power supply are at the same voltage level with

respect to a common point, before connecting the GND signal.

AUXILIARY OUTPUT VOLTAGES

The voltages at the pads to the left of Q1/Q2/Q3 are auxiliary output

voltages. The voltages with "B" reference designations are switched

voltages. Meaning they will be turned On and Off when the extender power

is turned On and Off. The other voltages are directly from the bus and

will be On as long as the system is On. These voltages are not fused.

5

SOFTWARE COMMANDS

The On-Off power control and the signal isolation to and from the bus can be
controlled with software. There are two registers on the Active Extenders to
control these functions. The base address for these registers is set at 200 at
the factory. The definition of these registers are as explained below. Please
note that the output of these registers are set to FF after the system is
powered-on each time.

You may change the base address if this address is conflicting with another
module in the system. The jumper illustration below give examples of few other
addresses.

Address Data, D7-D0 Function

0X201 1XXX XXXX TURN THE POWER OFF
0X201 0XXX XXXX TURN THE POWER ON

0X201 0XXX XXX0 POWER ON AND SWITCH 9 (U9) ACTIVE
0X201 0XXX XX0X POWER ON AND SWITCH 10 (U10) ACTIVE
0X201 0XXX XX00 POWER ON AND SWITCH 9 AND 10 ON

0X200 XXXX XXX0 SWITCH 1 ON
0X200 XXXX XX0X SWITCH 2 ON
0X200 0XXX XXXX SWITCH 8 ON

0X200 0000 0000 SWITCHES 1-8 ALL ON

NOTE: For the switches to be ON, the power has to be ON first or
simultaneously.

ADDRESS SELECTION EXAMPLE

A11 A10 A9 A8 A7 A6 A5 A4 DECIMAL HEX
0 0 1 0 0 0 0 0 512 200
0 0 1 0 0 0 1 0 544 220
0 0 1 1 0 0 0 0 768 300

Existence of Jumpers on the board represent 0 and no jumper represents 1.
The jumpers, JX, are located below RP2 and please note that they are not in
descending order as shown here, but are marked correctly.

NOTE: For the software command to work, the corresponding switches that are
being controlled must be in the OFF (open) positions.

6

EXAMPLE 1

The following example is a C program that allows the user to type in the
register value in hex and the program will load the value to the probe register
on the board. The base address for this example is assumed to be set at 0x200.

#include <stdio.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
long i, port;

/* Scan in Register1 */
printf(
Enter Data for SW8-SW1 (D7-D0), in Hex:
);
scanf(
%lx , &i);

/*Set Register1 */
outp(0x200, i);

/* Scan in Register2 */
printf(
Enter Data for ON-OFF, SW10 & SW9 (D7,D1,D0), in Hex: );
scanf(
%lx , &i);

/*Set Register2 */
outp(0x201, i);

/* Quit */
exit(0);

}

EXAMPLE 2

You can use the DEBUG mode on your system to control the board manually. Type
debug and you will see the prompt "-". Type ? for list of commands if you need
to. Command "o" is for output and "q" for exit from the DEBUG. After you type
debug and you get the dash prompt then 1) type o for output, 2) space, 3) the
address, 4) space and then the 5) data.

C:\>debug

-o 200 00 To enable the switches 1-8.

-o 201 00 To enable switches 9 &10 and turn the board on (should see the

LEDs turn On)

-o 201 ff To turn the board Off (should see the LEDs go Off)

Please note to have the On-Off switch and the dip switch in the Off positions.

7

AUXILIARY PINOUT

NOTE: These signals are only active when the Active Extender power is On and
the corresponding switches are closed. When the power is Off, these signals
are open impedance.

SIGNAL PIN PIN SIGNAL
JP7 TOP ROW JP7 BOTTOM ROW
B(BACK) A(FRONT)
GND 1 1 BIOCHK*
RESET (1) 2 2 D7
+5VB (2) 3 3 D6
IRQ9 4 4 D5
5 5 D4
S2-6 DRQ2 6 6 D3 S2-1
7 7 D2
ENDXFR* 8 8 D1
9 9 D0
GND 10 10 IOCHRDY*
MEMW* 11 11 AEN
MEMR* 12 12 A19
IOW* 13 13 A18
IOR* 14 14 A17
DACK3* 15 15 A16
S2-7 DRQ3 16 16 A15 S2-2
DACK1* 17 17 A14
DRQ1* 18 18 A13
REFRESH 19 19 A12
SYSCLK 20 20 A11
IRQ7 21 21 A10
IRQ6 22 22 A9
IRQ5 23 23 A8
IRQ4 24 24 A7
IRQ3 25 25 A6
S2-8 DACK2* 26 26 A5 S2-3
TC 27 27 A4
BALE 28 28 A3
+5VB 29 29 A2
OSC 30 30 A1
GND 31 31 A0

JP6 TOP ROW JP6 BOTTOM ROW
D(BACK) C(FRONT)
MEMCS16* 1 1 SBHE*
IOCS16* 2 2 A23
IRQ10 3 3 A22
IRQ11 4 4 A21
S2-9 IRQ12 5 5 A20 S2-4
IRQ15 6 6 A19
IRQ14 7 7 A18
DACK0* 8 8 A17
DRQ0 9 9 MEMR*
DACK5* 10 10 MEMW*
DRQ5 11 11 D8
DACK6* 12 12 D9
DRQ6 13 13 D10
DACK7* 14 14 D11
S2-10 DRQ7 15 15 D12 S2-5
+5VB 16 16 D13
MASTER* 17 17 D14
GND 18 18 D15

(1) RESET Signal status is only controlled by the On-Off switch (not the dip switch)
and or the RESET signal of the BUS.
(2) +5VB is only active when the extender board is on, (when the green LED next to the

8

power switch is on).

JUMPERS

In addition to the jumpers already explained in the previous sections,
there are a few other jumpers for use, in more advance debugging applications.
These Jumpers are JP10 through JP15 and are explained here.

JP10, installed at the factory, allows +5V current limiting to function as
specified. Disabling the current limiting function can be done by removing the
JP10 if it is so desired. Extreme caution is recommended. Otherwise permanent
damage can be done to the UUT, the extender board and the system motherboard.

JP11 to JP15 are used for a few selected control signals. In addition to
disabling the signals in groups of 10 via the dip switch, the listed control
signals can also be isolated from the bus on an individual bases.

Since the jumpers are not installed at the factory the extender board has
hard traces connecting these jumpers. Prior to installing any jumpers, the
traces need to be cut. A 2X1 (100 mil) shunt jumpers can be installed at these
locations and when jumpers are removed the signals will be isolated. Signals
controlled by these jumpers are:

JP11 DREQ1
JP12 DREQ3
JP13 IOCHRDY
JP14 DREQ2
JP15 IOCHECK

J6 PINOUT

+5EV J6.1 J6.2 +5EV
+5EV J6.3 J6.4 +5EV
+5S J6.5 J6.6
J6.7 J6.8
+12S J6.9 J6.10 -12EV

-5EV J6.11 J6.12 ON/OFF
+12EV J6.13 J6.14 +12EV
ON/OFF J6.15 J6.16 -5EV

-12EV J6.17 J6.18 +12S
J6.19 J6.20
J6.21 J6.22 +5S
+5EV J6.23 J6.24 +5EV
+5EV J6.25 J6.26 +5EV

MODEL PC/AT200

Model PC/AT200 offers an extended PC board area for the user's specific
circuitries. The bus on the component side of this area is connected to the
ground plane. The bus on the solder side is connected to 4 pads marked +V.
Please make sure that you connect the power and ground of any added circuitry
to the appropriate bus. Connect the +V pad(s) to the desired auxiliary output
voltage pads provided at the left of the grid area (i.e. +5V or +12V).

Voltages with "B" reference designations are switched voltages. The other
voltages are directly from the bus.

9

SPECIFICATIONS

J3-B01 through J3-B31, J4-B01 through J4-B18.

Bus:

ISA 8 and 16-bit, edge connector 31X2, 18X2.

Voltages:

Inputs From PC bus or the external input, Configurable by jumpers

per voltage.

Output Ratings +5V, Jumper selectable to 5 Amp or 1 Amp, -5V, 1 Amp.

+/- 12V, 1 Amp.

Drop Across the Switches 40 millivolts drop for every 1 Amp drawn for +5V.

30 millivolts drop for every 1 Amp drawn for -5V.
30 millivolts drop for every 1 Amp drawn for -12V.
30 millivolts drop for every 100 milliampere drawn for +12V.

Propagation Delay:

Less than a nano-second from the PC bus to the UUT.
The switch propagation delay is rated at only 250 pico­seconds.

Controls:

On-Off SPST switch on-board, software command, or external logic

input.

Bus Signals Bus signals can be turned on all at once or selectively in

any group of 10, via the dip switch or software.

Outputs:

J5 +5V current draw by the UUT can be measured at a two-point

terminal, J5, by a voltmeter. Each volt represents 1 Amp.

JP6, JP7- Auxiliary JP7-A01 through JP7-A31, JP6-A01 through JP6-A18.

JP7-B01 through JP7-B31, JP6-B01 through JP6-B18.

J3, J4- Main J3-A01 through J3-A31, J4-A01 through J4-A18.

Mechanical Dimensions:

PC/AT 150 Short size, Single slot, Length 9.6 inches, Height

6.3 inches.

PC/AT 200 Half size, Single slot, Length 13.5 inches, Height 6.3

inches.