PMAC2A PC104 Hardware Reference Manual

E4: CPU Frequency Select

 

E Point and

Location

Description

 

Default

 

Physical Layout

 

 

 

 

 

 

 

 

 

E4

C4

Remove jumper for 40 MHz operation (E2

 

No jumper installed

 

 

OFF also) or for 60 MHz operation (E4 ON).

 

(standard or Option 5EF)

 

 

 

 

 

 

 

Jump pin 1 to 2 for 80 MHz operation (E2

 

Jumper installed (Option

 

 

 

OFF).

 

5CF)

 

E8: Phase Clock Lines Output Enable

 

 

 

 

 

 

 

 

 

 

 

 

 

E Point and

Location

Description

 

Default

 

Physical Layout

 

 

 

 

 

 

 

 

 

 

B1

Jump pin 1 to 2 to enable the PHASE clock

 

No Jumper

 

E8

 

line on the J8 connector, allowing

 

 

 

 

 

 

 

synchronization with another PMAC.

 

 

 

 

 

 

 

Remove jumper to disable the PHASE clock

 

 

 

 

 

 

 

line on the J8 connector.

 

 

 

 

 

E9: Servo Clock Lines Output Enable

 

 

 

 

 

 

 

 

 

 

 

 

 

E Point and

Location

Description

 

Default

 

Physical Layout

 

 

 

 

 

 

 

 

 

 

 

Jump pin 1 to 2 to enable the SERVO clock

 

No Jumper

 

E9

 

line on the J8 connector, allowing

 

 

 

 

 

 

B1

synchronization with another PMAC.

 

 

 

 

 

 

 

Remove jumper to disable the SERVO clock

 

 

 

 

 

 

 

line on the J8 connector.

 

 

 

 

 

E10 – E12: Power-Up State Jumpers

 

 

 

 

 

 

 

 

 

 

 

 

 

E Point and

Location

Description

 

Default

 

Physical Layout

 

 

 

 

 

 

 

 

 

E10

E5

Remove jumper E10;

 

No E10 jumper installed;

 

 

 

Jump E11;

 

Jump E11 and E12

 

 

 

Jump E12;

 

 

 

 

 

 

 

 

 

 

 

To read flash IC on power-up/reset

 

 

 

 

 

 

 

Other combinations are for factory use only;

 

 

 

 

 

 

 

the board will not operate in any other

 

 

 

 

 

 

 

configuration.

 

 

 

 

 

E12

 

 

 

 

 

 

42

Base Board E-Point Jumper Descriptions

Page 48
Image 48
Delta Tau PMAC2A-PC/104 E4 CPU Frequency Select, E8 Phase Clock Lines Output Enable, E9 Servo Clock Lines Output Enable