UZZ9001 NXP Semiconductors, UZZ9001 Datasheet - Page 7

• Manufacturer Part Number: UZZ9001
• Manufacturer: NXP Semiconductors

Specifications of UZZ9001

• Lead Free Status / RoHS Status: Compliant

Philips Semiconductors
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:
2000 Nov 27
handbook, full pagewidth
handbook, full pagewidth
D13
Sensor Conditioning Electronic
00 0000 0000 0000
01 1111 1111 1111
inc
=
180
------------
2
13
0.022
DATA
DO
CS
B
B
=
MSB
=
P2 D13 D12 D11 D10 D9
0 , 180
2
13
–
1
sensor byte 2
180
------------
2
13
sensor byte 2
Fig.4 Sensor signal coding.
179.978
Fig.3 CS Line timing.
D8
D7
7
P1
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
The error and diagnostic conditions are indicated by
0
0
1
1
D1
D6
0
1
0
1
sensor byte 1
D0
D5
sensor byte 1
D4
magnet lost
reserved
reserved
available due to RESET
no valid value presently
D3
D2
CASE
D1
MHB701
LSB
D0
MHB700
Product specification
no
no
MEASUREMENT
UZZ9001
RELIABLE
VALUE