Infineon TLE4997, Руководство пользователя

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TLE4997
User’s Manual
TLE4997 Programming
User’s Manual 8 v01_01, 2019-08
3.3.1 Data Frame
The structure of a data frame sent to the device is shown in Figure 3-6 . The parity bits PE (bit 17) and PO (bit 18)
have to be set in the same way as for the command frame (bit 0 is the LSB, bit 20 is the MSB):
bit0 XOR bit2 XOR bit4 XOR …. XOR bit20 = 0
bit1 XOR bit3 XOR bit5 XOR …. XOR bit19 = 0
Figure 3-6 Data Frame to Sensor
Figure 3-7 shows a the structure data frame received from the sensor. Instead of a zero bit followed by two parity
bits, the least significant 3 bits of the address used for the readout are transmitted together with the data. This is
to check the plausibility of the received data.
Figure 3-7 Data Frame from Sensor
3.3.2 Interface Specification
Table 3-3 specifies the operating conditions of the programming interface, which must be met in order to ensure
correct operation of the TLE4997 during programming. All specified parameters refer to these operating
conditions, unless otherwise noted.
The specification for timings and electrical levels of the programming interface is shown in Table 3-4 . The meaning
of the timing parameters is illustrated in Figure 3-8 .
Table 3-3 Operating Range of the Programming Interface
Parameter Symbol Values Unit Note / Test Condition
Min. Typ. Max.
Supply voltage V
DD
4.5 – 5.5 V –
Supply buffer capacitance C
S
47 – 1000 nF V
DD
to GND
Load capacitance C
L
0.0
1)
1) >47nF soldered to the device required in case that connectivity failures can influence the programming voltage.
– 210 nF OUT to GND
Ambient temperature T
PRG
10 – 60 °C during programming
Number of programming
cycles N
PRG
10 Cycles Programming is allowed only at
start of lifetime
Programming time
t
PRG
– 100 – ms For complete memory
Programming start time
t
PRG_START
– – 19 ms To start programming mode, a
first read command shall be sent
within this time window after
power-up
1 0
P
O
P
E
DATA (16bit) 1
MSB (bit 20) LSB (bit 0)
1 ADR (3 LSBs) DATA (16bit) 1
MSB (bit 20) LSB (bit 0)