iC-NQL

13-bit Sin/D CONVERTER WITH SSI INTERFACE

Rev D2, Page 16/24

ZPOS

Adr 0x01, Bit 4:0

Code

Position

0x00

0°

0x08

90°

0x10

180°

0x18

270°

Notes

The zero signal is only output if released by the

input pins (for instance with PZERO = 5 V, NZERO =

VREF).

Table 20: Zero Signal Position

CFGZ

Adr 0x02, Bit 1:0

Code

Length

0x00

90°

0x01

180°

0x02.. 03

Synchronization

Table 21: Zero Signal Length

CFGAB

Adr 0x03, Bit 5:4

Code

Z = 1 for

0x00

B = 1, A = 1

0x01

B = 0, A = 1

0x02

B = 1, A = 0

0x03

B = 0, A = 0

Table 22: Zero Signal Logic

-180°

-90°

0°

90°

180°

Angle

SIN

COS

A

B

Z (CFGZ= 1)

Z (CFGZ= 2)

Z (CFGZ= 0)

Figure 11: Incremental output signals for various length of the zero signal.

Example for a resolution of 64 (SELRES = 0x0A), a zero signal position of 0° (ZPOS = 0x00,

CFGAB = 0x00) and no reversal of the rotational sense (ROT = 0x00, COS leads SIN).