ATA5279_10 ATMEL [ATMEL Corporation], ATA5279_10 Datasheet - Page 10

• Manufacturer Part Number: ATA5279_10
• Description: Antenna Driver for Multiple Antennas
• Manufacturer: ATMEL [ATMEL Corporation]

10
Atmel ATA5279
In the following example, there is a short circuit between the positive coil connections of coil 1
and 2.
Figure 3-4.
Taking the circuit situation shown above, the test run starts with both S_L1P and S_L2P
switches closed (default state when entering the diagnosis mode for the first time). The
read-back of the line state result in both times 0, which is not unexpected. However, the result
does not change when either altering the channel 1 or the channel 2 switch setting. That can
be caused both by the failure shown above and by short-circuits of both lines to ground. The
final diagnosis can be identified by changing both channels to the high-side switches (S_H1P
and S_H2P). In this case, the two status lines both return 1s – which eliminates the possibility
of two short-circuits to ground.
Table 3-2
summarizes this test sequence.
Example 1, Using the Diagnosis Mode
S_H1P
S_L1P
Status_1
A1P
R
GND
VDS
Short
A2P
Status_2
S_H2P
S_L2P
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