MPR084

Sensors

Freescale Semiconductor

21

Preliminary

6.4.1

Fault Register

The Fault Register is a read only register that shows the fault number under the current sensor conditions. Any write to the Fault

slave address of the Fault Register is 0x01.

Figure 24. Fault Register

7

6

543210

R

0

0

000

MNKE

FAULT

W

Reset:

0

0

000000

= Unimplemented

Table 15. Fault Register Field Descriptions

Field

Description

4

MNKE

Maximum Number of Keys Exceeded – The Maximum Number of Keys Exceeded

status bit indicates whether or not more keys than allowed are currently being

touched.

1 TPC Exceeded

0 TPC Not Exceeded

1:0

FAULT

Fault – The Fault code represents the currently asserted fault condition.

00 Encoding 0 – No fault detected

01 Encoding 1 – Short to VSS detected

10 Encoding 2 – Short to VDD detected