TLE5012 Datasheet, PDF (27/57 Pages) Infineon Technologies AG – GMR-Based Angular Sensor for Rotor Position Sensing

TLE5012
Specification
3.5.1.2 SSC Data Transfer
The SSC data transfer is word aligned. The following transfer words are possible:
• Command word (to access and change operating modes of the TLE5012)
• Data words (any data transferred in any direction)
• Safety word (confirms the data transfer and provide status information)
twr _del ay
COMMAND
READ Data 1
READ Data 2
SAFETY-WORD
SSC-Master is driving DATA
SSC-Slave is driving DAT A
Figure 17 SSC Data Transfer (Data Read Example)
twr_delay
COMMAND WRITE Data 1
SAFETY-WORD
Figure 18
SSC-Master is driving DATA
SSC-Slave is driving DAT A
SSC Data Transfer (Data Write Example)
Command Word
The TLE5012 is controlled by a command word. It is sent first at every data transmission.The structure of the
command word is shown in Table 13, where the UPD-bit allows the access to current values or updated values.
If an update command is issued and the update bit (UPD) is set, the immediate values are stored in the update
buffer simultaneously. This enables a snapshot of all necessary system parameters at the same time. Bits with an
update buffer are marked by an “u” in type of register description. The initialization of such an update is descripted
on page 29.
Table 13
Name
RW
Lock
Structure of the Command Word
Bits
Description
[15]
Read - Write
0:Write
1:Read
[14..11]
4 bit Lock Value
0000_B: Default Operating Access for addresses 0x00:0x04
1010_B: Config- Access for addresses 0x05:0x11
Target Data Sheet
27
V 0.46, 2009-09