 |
|||
|
|
|||
| ||||||||||
|
|  MIL-N-8160K(AS)
Para 3.4.4.1f
(cont)
The particular word in memory to be loaded shall be
*
indicated by means of six label bits attached to
the transmitted data (see format in figure 8). Bit
1 (MSB of label) shall be loaded with a logic zero.
The ANCU or test equipment designed in accordance
with XAS-1233, or equivalent, may load data in any
sequence since the label will establish the 16 core *
locations into which the data are to be loaded.
When reading the memory data, the ANCU shall receive
*
sequenced data, labels 0 thru 31. The label bits
shall be determined by an address sequencer in the
IMU memory, which is reset to zero for a maximum
*
of 500 msec during power turn-on. Sequencing of
the data shall repeat after the block of 32 words
is transmitted. A parity bit shall be assigned such
that the total number of one's transmitted in bits
1 thru 22 is odd. Figure 9 presents the timing
diagram for the serial transfer of IMU calibration
data between the ANCU and IMU.
1234567891011
121314151617181920
2122
\
L
M
M
L
o SLABEL S s s
CALIBRATION DATA
s
P
B
B
B
B
BIAS AND SCALE FACTOR CORRECTION DATA WORD FORMAT
Note: S = sign bit (O = plus)
P = parity
Figure 8.
Calibration Data Word Format
(1) Calibration Data Clock - This clock input to
the IMU from the ANCU or test equipment designed
-
in accordance with XAS-1233, or equivalent,
*
shall be used for gating the calibration data
in and out of the IMU. Any clock rate less
than or equal to 250 KHz may be supplied to
the IMU. The pulse width of the clock shall
be greater than 200 nanoseconds. The ANCU
44
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals