ATA5279_10 ATMEL [ATMEL Corporation], ATA5279_10 Datasheet - Page 25

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

3.9.4
9125I–RKE–09/10
Status Monitor
The status monitor holds all information from the diagnosis stage. In case of an existing fault,
all power stages are disabled. As soon as a fault is stored, an interrupt request (IRQ) to the
microcontroller is generated. This signal is persistent until the status info is polled by the
microcontroller. The entry in the fault register can only be cleared by the Reset Fault com-
mand or a global reset.
There are two different status registers:
The fault register is encoded as follows:
Table 3-8.
The meaning of the bits is described below:
Fault Register
• A general IC status register (requestable by the Get Status Info command)
• A coil-driver related fault register (requestable by the Get Fault Info command)
• D
• T: A temperature shutdown has occurred. Note that there is not necessarily a link between
• F
• F
• F
• F
selected driver can be affected by external faults. Therefore, it is sufficient to store the type
of failure and the corresponding driver number. Refer to
Command Description” on page 22
the driver number and this fault, as all sensor signals of the chip are OR’ed together.
However, in general, it can be assumed that the last active driver also caused the
overtemperature condition.
current detection unit was not able to find a sinusoidal signal on the VSHS pin although the
LF coil was driven. The reason for this can either be an open load condition or a
short-circuit on the AxN pin towards ground.
applications, this is only the case if there is a high current flowing through the shunt
resistor. The typical reason for this is a short-circuit on the AxN line towards battery.
Another possible reason could be a shorted LF coil.
AxP line. The most typical reason for this is a short-circuit towards ground.
AxP line. The most typical reason for this is a short-circuit towards battery.
03
02
01
00
G
, D
: This bit indicates a missing return line signal during modulation. That means that the
: This bit indicates an excessive positive voltage on the VSHS pin. In normal
: This bit indicates an excessive current through the high-side transistor that drives the
: This bit indicates an excessive current through the low-side transistor that drives the
1..0
: The driver group and number that was active when the fault occurred. Only a
Fault Assignment between Driver Stages and the Fault Registers
MSB
D
G
for further details on the coding of these bits.
D
1
D
0
Section 3.9.3 “Driver-related
T
Atmel ATA5279
F
03
F
02
F
01
LSB
F
00
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