User's Manual

CHAPTER 3
Operations at the Application Level
43
DESCRIPTION All values are 8 bits and must be converted accordingly, depend-
ing on the sensor connected. Figure 5 shows the placement of var-
ious inputs on the connectors.
Figure 5. A720 Connector Inputs
The RF level is nonlinear and results from a table (which you can
get from Adcon as an ASCII file). The value of the battery can be
computed as follows:
The digibyte is essentially the reflection of several inputs or inter-
nal status bits on the A720; its structure is described below:
For more details, refer to the user manual for the A720 device.
The A723 (addIT series 3) Frames
The addIT series 3 implements currently two frame types, depend-
ing on the compatibility mode flag: 38 (described on page 42) and
39. For more details about the compatibility flag, refer to the A720
series user manual.
There is, however, a fundamental difference between frame 39 and
the previously described data frames. The A723 samples the ana-
log values with 10-bit resolution and stores them as 12-bit values.
Analog1
Analog2
Analog3
Ground
Power
DIG0
PulseCounter0
1
2
3
4
5
6
7
Analog4
Analog5
Analog6
Ground
Power
DIG1
PulseCounter1
1
2
3
4
5
6
7
I/O A
I/O B
A720
Batt
V[]
BatteryLevel 20•
255
----------------------------------------------=
B7 B6
B5 B4
B3 B2
B1 B0
S.C.
res
res res res
res DIG1 DIG0
S.C. = Solar Cell status res = reserved