ST72561J9-Auto STMicroelectronics, ST72561J9-Auto Datasheet - Page 184

• Manufacturer Part Number: ST72561J9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72561J9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years at 55 °C
• 5 Power Saving Modes: halt, auto wake up from halt, active halt, wait and slow

LINSCI serial communication interface (LIN master/slave)
Note:
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Note: The transmitter can be either a master or a slave (in case of a slave listening to the
If the period desynchronization of the slave is +15% (slave too slow), the character “00h”
which represents a sequence of 9 low bits must not be interpreted as a break character (9
bits + 15% = 10.35). Consequently, a valid LIN Synch break must last at least 11 low bits.
LINSCI clock tolerance when synchronized
When synchronization has been performed, following reception of a LIN synch break, the
LINSCI, in LIN mode, has the same clock deviation tolerance as in SCI mode, which is
explained below:
During reception, each bit is oversampled 16 times. The mean of the 8th, 9th and 10th
samples is considered as the bit value.
Consequently, the clock frequency should not vary more than 6/16 (37.5%) within one bit.
The sampling clock is resynchronized at each start bit, so that when receiving 10 bits (one
start bit, 1 data byte, 1 stop bit), the clock deviation should not exceed 3.75%.
Clock deviation causes
The causes which contribute to the total deviation are:
●
●
●
●
●
All the deviations of the system should be added and compared to the LINSCI clock
tolerance:
D
Figure 86. Bit sampling in reception mode
TRA
RDI LINE
Sample
D
D
D
D
the reception of one complete LIN message assuming that the deviation has been
compensated at the beginning of the message.
D
clock
+ D
TRA
response of another slave).
MEAS
QUANT
REC
TCL
MEAS
: deviation due to the transmission line (generally due to the transceivers)
: deviation due to transmitter error.
: deviation of the local oscillator of the receiver: This deviation can occur during
: error due to the LIN Synch measurement performed by the receiver.
: error due to the baud rate quantization of the receiver.
+D
1
QUANT
2
+ D
3
REC
4
7/16
Doc ID 12370 Rev 8
+ D
5
TCL
6
< 3.75%
7
sampled values
8
One bit time
9
10
11
12
13
6/16
7/16
14
15
ST72561-Auto
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