Infineon Technologies TLE5012B, Руководство пользователя

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TLE5012B
Interfaces
User’s Manual 33 Rev. 1.2, 2018-02
5.2.2 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 TLE5012B)
• Data words (any data transferred in any direction)
• Safety Word (confirms the data transfer and provides status information)
Figure 5-2 SSC data transfer (data-read example)
Figure 5-3 SSC data transfer (data-write example)
Command Word
SSC Communication between the TLE5012B and a microcontroller is generally initiated by a command word. The
structure of the command word is shown in
Table 5-4 , where the Update (UPD) bit allows the access to current
values or updated values. If an update command is issued and the UPD bit 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 the Type column in register descriptions. The initialization
of such an update is described on page
35 .
Table 5-4 Structure of the Command Word
Name Bits Description
RW [15] Read - Write
0: Write
1: Read
Lock [14..11] 4-bit Lock Value
0000
B
: Default operating access for addresses 0x00:0x04, 0x14:0x15, 0x20,
0x30
1010
B
: Configuration access for addresses 0x05:0x11
COMMAND READ Data 1 READ Data 2
SAFETY-WORD
SSC-Master is driving DATA
SSC-Slave is driving DATA
t
wr_delay
COMMAND WRITE Data 1
SAFETY-WORD
SSC-Master is driving DATA
SSC-Slave is driving DATA
t
wr_delay