Delta Tau Turbo PMAC PCI-Lite, Справочник по аппаратуре

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Turbo PMAC PCI Lite
32 E-Point Jumper Descriptions
E29 - E33: Phase Clock Frequency Control
Jumpers E29 through E33 control the speed of the phase clock, and, indirectly, the servo clock, which is
divided down from the phase clock (see E3 - E6). No more than one of these five jumpers may be on at a
time.
Phase Clock Frequency Default and
Physical
Layout
Location
E29 E30 E31 E32 E33
E98 Connects
Pins 1 and 2 E98 Connects
Pins 2 and 3
ON OFF OFF OFF OFF 2.26 kHz 1.13 kHz
E29
A8
OFF ON OFF OFF OFF 4.52 kHz 2.26 kHz
E30
A8
OFF OFF ON OFF OFF 9.04 kHz 4.52 kHz
E31
A8
OFF OFF OFF ON OFF 18.07 kHz 9.04 kHz
E32
A8
OFF OFF OFF OFF ON 36.14 kHz 18.07 kHz
E33
A8
Note: If E40-E43 are not all ON, the phase clock is received from an external source through the J4 serial-port
connector, and the settings of E29 – E33 are not relevant.
E34A - E38: Encoder Sampling Clock Frequency Control
Jumpers E34A - E38 control the encoder-sampling clock (SCLK) used by the gate array ICs. No more
than one of these six jumpers may be on at a time.
SCLK Clock Frequency
Default and Physical Layout
E34A E34 E35 E36 E37 E38
E34A E34 E35 E36 E37 E38
A8 A8 A8 A8 A8 A8
ON OFF OFF OFF OFF OFF 19.6608 MHz
OFF ON OFF OFF OFF OFF 9.8304 MHz E34 ON
OFF OFF ON OFF OFF OFF 4.9152 MHz
OFF OFF OFF ON OFF OFF 2.4576 MHz
OFF OFF OFF OFF ON OFF 1.2288 MHz
OFF OFF OFF OFF OFF ON External clock 1 to 30 MHz
maximum input on CHC4
and CHC4/
E40-E43: Phase Servo Clock Direction Control
E Point and
Physical Layout
Location Description Default
E40 – E43
B5 Jump pins 1 to 2 on all four E points for card to
generate its own Phase and Servo clocks and output
them on RS422 connector.
Remove jumper from any E point for card to
receive external Phase and Servo clock signals on
RS422 connector.
All jumpers