Hardware Preparation

 

SRAM Battery Backup Source Select Header (J20)

2

The MVME162 is factory-configured to use VMEbus +5V Standby power as a

 

backup power source for the SRAM (i.e., jumpers are installed across pins 1

 

and 3 and 2 and 4). To select the onboard battery as the backup power source,

 

install the jumpers across pins 3 and 5 and 4 and 6.

 

Note

Caution

For MVME162s without optional VMEbus interface (i.e., without VMEchip2 ASIC), you must select the onboard battery for the backup power source.

Removing all jumpers may temporarily disable the SRAM. Do not remove all jumpers from J20, except for storage

 

 

J20

 

J20

 

 

J20

1

 

 

 

 

 

2

1

 

2

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

5

 

 

 

 

 

6

5

 

6

5

 

 

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VMEbus +5V STBY

Backup Power Disabled

Onboard Battery

(Factory configuration)

(For storage only)

 

 

 

 

 

 

 

EPROM Size Select Header (J21)

The MVME162 is factory-configured for a 4Mbit EPROM (i.e., a jumper is installed across pins 2 and 3). This is the only size currently available; if a larger PROM becomes available, this jumper will allow it to be selected.

J21

1

2

3

4Mbit EPROM

(Factory configuration)

MVME162IG/D2

2-7

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Image 39
Motorola MVME162 manual Sram Battery Backup Source Select Header J20, Eprom Size Select Header J21
Page 38 Page 40
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