Delta Tau Universal PMAC Lite, Hardware Reference Manual

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Universal PMAC Lite
PMAC Lite E-Point Descriptions 30
E90: Host-Supplied Switch Pull-Up Enable
E Point and
Physical Layout
Location Description Default
E90 G2 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 also E85, E87, E88 and PMAC Opto-
isolation diagram
1-2 Jumper installed
E91 - E92: Bus Base Address Select (High Bits)
E Point and
Physical Layout
Location Description Default
E91 E92 D3 E91 - Bit 11 PC bus base address
E92 - Bit 10 PC bus base address
ON = 0 OFF = 1
Jumper installed
These jumpers work with E66 - E71 to set the base address of PMAC Lite on the PC bus. See PMAC Lite
Jumpers Summary section for details on how to set these jumpers.
E93 - E94: Reset from Bus by Software Enable
E Point and
Physical Layout
Location Description Default
E93 C3 Jump 1-2 to provide hardware Reset of
PMAC Lite under the software control of
the host-PC. PMAC Lite will power up
and stay in the Reset state until PC
software writes 40 HEX to Base +12.
PMAC Lite can be put in Reset state by
PC writing 40 HEX to Base +10.
Remove jumper to disable this function.
Only one of E39, E93, E94 should be ON
at the same time.
No jumper
E94 C3 Jump 1-2 to provide hardware Reset of
PMAC Lite under the software control of
the host-PC. PMAC Lite will power up in
Normal mode. PMAC Lite can be put in
Reset state by PC writing 40 HEX to
Base+12. PMAC Lite can be released
from Reset state by PC writing 40 HEX to
Base +10.
Remove jumper to disable this function.
Only one of E39, E93, E94 should be ON
at the same time.
No jumper