Reference Manual

PMAC PCI Lite Hardware Reference Manual
E-Point Jumper Descriptions 39
E87 - E88: Host-Supplied Analog Power Source Enable
E Point and
Physical Layout
Location Description Default
E87
A5 Jump pin 1 to pin 2 to allow AGND to come from PC
bus. Ties amplifier and PMAC GND together. Defeats
OPTO coupling.
Note:
If E87 is changed, E85 and E88 must be changed also.
See E90.
No jumper
E88
A2 Jump pin 1 to pin 2 to allow A-14V to come from PC
bus. Ties amplifier and PMAC power supply together.
Defeats OPTO coupling.
Note:
Note that if E88 is changed, E87 and E85 must be
changed also.
See E90.
No jumper
E89: Amplifier-Supplied Switch Pull-Up Enable
E Point and
Physical Layout
Location Description Default
E89
B5 Jump pin 1 to 2 to use A+15V on J8 (JMACH1) pin 59
as supply for input flags.
Remove jumper to use A+15V/OPT+V from J9 pin 9
as supply for input flags.
Note:
This jumper setting is only relevant if E90 connects pin
1 to 2.
Jumper installed
E90: Host-Supplied Switch Pull-Up Enable
E Point and
Physical Layout
Location Description Default
E90
B5 Jump pin 1 to 2 to use A+15V from J8 pin 59 as supply
for input flags (E89 ON) {flags should be tied to
AGND} or A+15V/OPT+V from J8 pin 11 as supply
for input flags (E89 OFF) {flags should be tied to
separate 0V reference}.
Jump pin 2 to 3 to use +12V from PC bus connector P1
pin B09 as supply for input flags (flags should be tied
to GND).
See E85, E87, E88 and PMAC Opto-isolation diagram.
1-2 Jumper installed