E521.41 Datasheet, PDF (46/89 Pages) ELMOS Semiconductor AG – Transceiver compliant with PSI5 standard v1.3 and v2.1

4 Channel Multi-Mode PSI5 Transceiver
PRODUCTION DATA – Apr 27, 2016
E521.41
For synchronous PSI5 mode the "SPI_data_buffer" has to be synchronized with the PSI5 data.
It is recommended to read PSI5 data buffer after all PSI5 slots within the current cycle where received.
The SPI read access shall start later than "latest PSI5-slot end" + 3 · tGAP and shall end before "earliest
PSI5-slot end" of the next PSI5 slot.
latest end
PSI5 Bus
voltage
PSI5 Bus
current
slot 2
slot n
Read sensor data command shall not
start before latest end + 3 · tGAP
3·t
GAP
SYNC
slot 1
Valid read sensor
data window
earliest end
slot 2
Read command shall end
before earliest end
NCS
SDI
SDO
CMD:
read_sensor_data
slot 1
Previous
response
SPI frame
Response 1.1
SPI frame
Response 1.2
Additional
sensor data
CMD:
read_sensor_data
slot n
Previous
response
SPI frame
Response n.1
SPI frame
Response n.2
t
Figure 6.2.3.9-1: Valid read sensor data window 1
If data buffer has to be read interleaved within the PSI5 cycle the same constrains have to be considered.
The SPI read access shall start later than "latest PSI5-slot end" + 3 · tGAP and shall end before "earliest
PSI5-slot end" of the next PSI5 slot.
SYNC
PSI5 Bus
voltage
PSI5 Bus
current
Read sensor data command shall not
start before latest end + 3 · tGAP
NCS
SDI
CMD: read_sensor_data_16b
latest end
slot 1
3·t
GAP
earliest end
slot 2
Valid read sensor
data window
SPI frame
SYNC
slot n
Read command shall end
before earliest end
SPI frame
SDO
Previous CMD response
Response 1
Response 2
t
Figure 6.2.3.9-2: Valid read sensor data window 2
For asynchronous sensor mode it is not possible to access the data buffer synchronous to PSI5 data.
In this case it is recommended to use the UART mode.
Elmos Semiconductor AG reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.
Elmos Semiconductor AG
Data Sheet
46 / 89
QM-No.: 25DS0109E.06