UZZ9001 datasheet(7/16 Pages) PHILIPS

Teilenummer	UZZ9001

Bauteilbeschribung	Sensor Conditioning Electronic

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Hersteller	PHILIPS [NXP Semiconductors]

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7 / 16 page

2000 Nov 27

7

Philips Semiconductors

Product speciﬁcation

Sensor Conditioning Electronic

UZZ9001

handbook, full pagewidth

DATA

CS

MHB700

sensor byte 2

sensor byte 1

Fig.3 CS Line timing.

Sensor signal coding

The sensor signal comprises 14 bits (D13 to D0) as shown

in Fig.4. Bits D12 to D0 are used for the coding of the

angle while D0 is reserved to indicate error and diagnostic

conditions as defined below. The 14 data bits are arranged

in 2 Bytes. D13 is the MSB of the sensor signal and D0 is

the LSB of the sensor signal. Byte 2, which is sent first,

contains data bits D13 to D7 and additionally the parity bit

P2 which is included for the recognition of interrupted

messages. P2 gives the ODD parity of data bits D13 to D7

and has to be evaluated by the master module.Similarly,

Byte 1 comprises data bits D6 to D0 and parity bit P1,

which gives the ODD parity of data bits D6 to D0. The

internal coding of angle values is as follows:

During normal operation, bit D13 is active low. Each

increment represents an angle value

of:

The error and diagnostic conditions are indicated by

D13 = 1 (active high). In an error situation the last two bits

(D0 and D1) specify the error code (see Table 2). All other

bits (D3 to D12) still show the current measurement value,

but as the last two bits are lost for measurement

representation the resolution is reduced to 11 bit.

Table 2

Error and diagnostic cases coding

00 0000 0000 0000B =0°, 180°

01 1111 1111 1111B =

D13

DO

2

13

1

–

()

180

°

2

13

------------

179.978

≈

α

inc

180

°

2

13

------------

=

0.022

°

≈

D1

D0

CASE

MEASUREMENT

VALUE

RELIABLE

0

no valid value presently

available due to RESET

no

0

1

magnet lost

no

1

0

reserved

−

1

reserved

−

handbook, full pagewidth

MHB701

P2 D13 D12 D11 D10 D9

D8

D7

P1

D6

D5

D4

D3

sensor byte 2

sensor byte 1

D2

D1

D0

MSB

LSB

Fig.4 Sensor signal coding.

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