Delta Tau GEO BRICK LV User Manual
Turbo PMAC User Manual
Turbo PMAC System Configuration and Auto Configuration
21
1.
Servo IC 0
(On-board or 3U Stack) (I19=7007)
2.
MACRO IC 0
(On-board or Acc-5E)
(I19=6807)
3.
Servo IC 1
(On-board or 3U Stack) (I19=7107)
4.
Servo IC 2
(Acc-24E2, 51E)
(I19=7207)
…
11.
11.
Servo IC 9
(Acc-24E2, 51E)
(I19=7907)
12.
Servo IC 2*
(Acc-24E2, 51E)
(I19=7257)
…
19.
19.
Servo IC 9*
(Acc-24E2, 51E)
(I19=7957)
20.
MACRO IC 1
(On-board or Acc-5E)
(I19=6857)
21.
MACRO IC 2
(On-board or Acc-5E)
(I19=6907)
22.
MACRO IC 3
(On-board or Acc-5E)
(I19=6957)
(MACRO ICs must be DSPGATE2 ICs to be used as a clock source.)
Next, it sets I19 to the number of the clock-direction I-variable for the first of these ICs it finds
automatically. For example, if it finds Servo IC 0, it will set I19 to 7007. Finally, it will set this clock-
direction I-variable to 0, and the clock-direction I-variable for all of the other Servo and MACRO ICs that it
finds to 3.
Next, it sets I19 to the number of the clock-direction I-variable for the first of these ICs it finds
automatically. For example, if it finds Servo IC 0, it will set I19 to 7007. Finally, it will set this clock-
direction I-variable to 0, and the clock-direction I-variable for all of the other Servo and MACRO ICs that it
finds to 3.
However, if it finds on re-initialization that the E1 jumpers are configured to use external phase and servo
clocks, I19 is set to 0 and all of the clock-direction I-variables are set to 3.
clocks, I19 is set to 0 and all of the clock-direction I-variables are set to 3.
Note:
Once the system has been set up to take external phase and servo clock signals,
these signals must always be present while the system is powered, or the watchdog
timer will trip immediately.
these signals must always be present while the system is powered, or the watchdog
timer will trip immediately.
To change a system set up for external clocks back to internal clocks, it is necessary to power it up with
the E3 re-initialization jumper ON, the E1 external-clock jumper OFF, and with the external clock signals
present. Once the new configuration for internal-clock source is established, either by the automatic re-
initialization actions, or user-set configuration (see below), these settings must be stored to flash memory
with the SAVE command. Then the system can be powered down, the E3 re-initialization jumper
removed, and the external clock signals removed. Finally, the system can be powered up again normally.
the E3 re-initialization jumper ON, the E1 external-clock jumper OFF, and with the external clock signals
present. Once the new configuration for internal-clock source is established, either by the automatic re-
initialization actions, or user-set configuration (see below), these settings must be stored to flash memory
with the SAVE command. Then the system can be powered down, the E3 re-initialization jumper
removed, and the external clock signals removed. Finally, the system can be powered up again normally.
Note:
If a Turbo PMAC2 is on a MACRO ring, but it is not the ring controller
synchronizing master, it must be set up to have its phase clock adjusted by receipt
of the sync packet over the MACRO ring. This is done by setting bit 7 of I6840 to
1, and bits 16 – 19 of I6841 to the node number of the sync packet (usually $F
[=15]). In this case, the phase and servo clocks are still generated internally,
although they are locked to receipt of this sync packet. Systems of this type should
have I6807 set to 0 (I19 set to 6807) to use MACRO IC 0 as the source of the
phase and servo clocks. If re-initialization does not automatically cause this to
happen, it must be done manually (see below).
synchronizing master, it must be set up to have its phase clock adjusted by receipt
of the sync packet over the MACRO ring. This is done by setting bit 7 of I6840 to
1, and bits 16 – 19 of I6841 to the node number of the sync packet (usually $F
[=15]). In this case, the phase and servo clocks are still generated internally,
although they are locked to receipt of this sync packet. Systems of this type should
have I6807 set to 0 (I19 set to 6807) to use MACRO IC 0 as the source of the
phase and servo clocks. If re-initialization does not automatically cause this to
happen, it must be done manually (see below).
User-Customized Clock-Source Specification
The procedure to change the clock source is slightly different for 3U-format Turbo PMAC2 systems and
other Turbo PMAC2 systems.
In a 3U-format Turbo PMAC2 system (UMAC Turbo or 3U Turbo Stack), to change the clock source,
simply follow this 3-step procedure:
1. Set I19 to the number of the clock-source I-variable of the IC you want to be the source.
2. Store this value to non-volatile flash memory with the SAVE command.
3. Reset the system normally (not re-initialization).
other Turbo PMAC2 systems.
In a 3U-format Turbo PMAC2 system (UMAC Turbo or 3U Turbo Stack), to change the clock source,
simply follow this 3-step procedure:
1. Set I19 to the number of the clock-source I-variable of the IC you want to be the source.
2. Store this value to non-volatile flash memory with the SAVE command.
3. Reset the system normally (not re-initialization).