Microsemi SA.22c - Factory Mode; Serial Interface Initialization

SA.22c Rubidium Oscillator
Designer Reference and User Guide Revision D 28
Bit Hex
Value
Control Description Controlled By
9 2 Sine
output
level
adjust
0= Zero additional level
1= Adds 5% of max output
(default)
Configuration is set by entering the control register value during
TACO. Not configurable in customer firmware.
10 4 Service 0= Unit is OK
1= Unit requires service
Controlled by SDCP, automated function, no user input
11 8 1PPS
locked
(sync)
0= No 1PPS sync
1= 1PPS locked to ext 1PPS
Controlled by SDCP, automated function, no user input
12 1 External
1PPS
0= No 1PPS external signal
1= 1PPS external signal present
Controlled by SDCP, automated function, no user input
13 2 FC pin
enabled
0= Frequency control pin disabled
1= Frequency control pin enabled
Controlled by SDCP, automated function, no user input
14 4 Reserved
not used
15 8 Reserved
not used
6.1.3 Factory Mode
Data output from the SA.22c in factory mode is not intended for users outside the factory and is not
described in this document beyond the table .Run Mode Commands (see page 28)
Caution: Using factory mode results in the erasure of firmware on the SA.22c rendering it inoperable
and making it necessary to return the unit to the factory for re-programming.
6.1.4 Serial Interface Initialization
The serial interface is initialized as listed in the following tables.
Table 10 • Run Mode Commands
User Output
to SA.22c
Response to
Host
Command Name and Description
a Set FC mode
Example: a <zero or
non-zero integer>
<cr>
To be specified Set analog frequency control mode.
This command toggles the analog input pin to the unit between enable and Freq Cntrl
disable. In factory mode, the default is enabled. During factory test, the default is set
to disable for shipping unless the customer ordered the default to be set enabled.
f Desired frequency
change from free
running center
frequency in parts to
1×10
–11
Example: for a
100×10
–11
change: 100<cr>
Example: for a –
100×10
–11
change: –100<cr>
To be specified Adjust frequency.
Adjust unit output frequency. Used to discipline the unit. The smallest incremental
frequency change is 2×10 (or ). Any value less than this will still be allowed, but
–12
f.2
not executed by the hardware. Maximum value that can be used at one time is 4×10 .
–8
For larger frequency changes, repeated steps equal to or smaller than 4×10 must be
–8
used. Unit always powers up at free running factory set frequency. This command is
always relative to the free running frequency.
h To be specified Help command.
Displays menu.
i To be specified Outputs unit information.
While dumping data, clock outputs are not guaranteed to meet specifications during
the use of this command.