AS8222

Datasheet - Detailed Descr i p ti on

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Revision 1.0

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7.15 Error and Status Flags Read Out

The error and status flag readout mechanism is a serial transmission which is controlled with the EN pin and the information is submitted on the

ERRN pin. The mechanism is only activated in NORMAL and RECEIVE-ONLY mode. In all other operation modes the error and status

information cannot be accessed.

Figure 6. Timing of the Readout Mechanism

The error and status flags are read out by applying a clock signal to pin EN. A falling edge on pin EN starts the readout loading the content of the

error/status flag into the shift register and signaling the stream of flags on the ERRN pin. On the second falling edge the first flag (Bit 0) will be

mode indicated by the host pins.

Table 22. Bit Order for the Readout Sequence

BIT

Flag Description

Bit 0

Bit 1

Bit 2

Bit 3

Bus error

Bit 4

BGE status

Bit 5

Bit 6

BP short circuit to GND

Bit 7

Bus open line

Bit 8

Bit 9

BM short circuit to GND

Bit 10

Short circuit between BP and BM

Bit 11

Over temperature

Bit 12

TxEN_BGE timeout

Bit 13

Local wake flag

Bit 14

Remote wake flag

Bit 15

Power on flag

ERRN

ERROR FLAG

Bit 0

Bit 1

Bit 2

Bit 3

ERRN

ERRN

EN