MPR084 datasheet(21/39 Pages) FREESCALE

tên linh kiện	MPR084

Giải thích chi tiết về linh kiện	Proximity Capacitive Touch Sensor Controller

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MPR084

Sensors

Freescale Semiconductor

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

Register will clear the register, when in Stop mode. The Fault register cannot be cleared when the part is in a Run mode. The I2C

slave address of the Fault Register is 0x01.

Figure 24. Fault Register

543210

000

MNKE

FAULT

Reset:

000000

= Unimplemented

Table 15. Fault Register Field Descriptions

Field

Description

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

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