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Delta Tau PMAC2A-PC/104 Manual Pagina 47

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PMAC2A-PC104 Hardware Manual
Base Board E-Point Jumper Descriptions 41
BASE BOARD E-POINT JUMPER DESCRIPTIONS
E0: Forced Reset Control
E Point and Physical
Layout
Location Description Default
E0
B3
Factory use only; the board will not
operate with E0 installed.
No jumper
E1: Servo and Phase Clock Direction Control
E Point and Physical
Layout
Location Description Default
E1
B4
Remove jumper for PMAC to use its
internally generated servo and phase
clock signals and to output these
signals on the J8 serial port connector.
Jump pins 1 and 2 for PMAC to expect
to receive its servo and phase clock
signals on the J8 serial port connector.
No jumper
installed
Note
If the E1 jumper is ON and the servo and phase clocks are not brought in on the J8
serial port, the watchdog timer will trip immediately.
E2: CPU Frequency Select
E Point and Physical
Layout
Location Description Default
E2
B4
Remove jumper for 40 MHz operation
(E4 OFF also) or for 80 MHz operation
(E4 ON).
Jump pin 1 to 2 for 60 MHz operation
(E4 OFF).
No jumper
installed
E3: Normal/Re-Initializing Power-Up/Reset
E Point and Physical
Layout
Location Description Default
E3
C4
Jump pin 1 to 2 to re-initialize on
power-up/reset, loading factory default
settings.
Remove jumper for normal power-
up/reset, loading user-saved settings.
No jumper
installed
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