MPR03X

Sensors

Freescale Semiconductor

13

Preliminary

5.3

Filtered Data

Each electrode has an associated filtered output. This output is generated through register settings and a low pass filter

implementation (Section 8.4).

5.3.1

Filtered Data Low Register

The Filtered Data Low register contains the data on each of the electrodes. It is paired with the Filtered Data High register for

reading the 10 bit A/D value. The address of the ELE0 Filtered Data Low register is 0x02. The address of the ELE1 Filtered Data

Low register is 0x04. The address of the ELE2 Filtered Data Low register is 0x06.

Figure 18. Filtered Data Low Register

5.3.2

Filtered Data High Register

The Filtered Data High register contains the data on each of the electrodes. It is paired with the Filtered Data Low register for

reading the 10 bit A/D value. The address of the ELE0 Filtered Data High register is 0x03. The address of the ELE1 Filtered Data

High register is 0x05. The address of the ELE2 Filtered Data High register is 0x07.

Figure 19. Filtered Data High Register

7

6

543210

RFDLB

W

Reset:

0

0

000000

= Unimplemented

Table 7. Filtered Data Low Register Field Descriptions

Field

Description

7:0

FDLB

Filtered Data Low Byte – The Filtered Data Low Byte displays the lower 8 bits of

the 10 bit filtered A/D reading.

00000000 Encoding 0

~

11111111 Encoding 255

7

6

543210

R

0

0

0000

FDHB

W

Reset:

0

0

000000

= Unimplemented

Table 8. Filtered Data High Register Field Descriptions

Field

Description

7:0

FDHB

Filtered Data High Bits – The Filtered Data High Bits displays the higher 2 bits of

the 10 bit filtered A/D reading.

00 Encoding 0

~

11 Encoding 3