Delta Tau PMAC2A-PC/104 - Manual (Page 47)

PMAC2A PC104 Hardware Reference 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