Datasheet

265
ATmega48/88/168 Automotive [DATASHEET]
7530K–AVR–07/14
26.8.1 RC Oscillator Precision for LIN Slave implementation
For LIN slave devices, the precision of the RC oscillator before and after re-synchronization are described in the Table 26-2.
Table 26-2. Oscillator Tolerance Before and After Re-Synchronization Algorithm (2.7V < V
CC
< 5.5V,
–40°C to +125°C)
Parameter Clock Tolerance ΔF/F
Master
F
TOL_UNSYNCH
Deviation of slave node clock from the nominal clock rate before
synchronization; relevant for nodes making use of synchronization and direct
SYNCH BREAK detection.
±14.0%
F
TOL_SYNCH
Deviation of slave node clock relative to the master node clock after
synchronization; relevant for nodes making use of synchronization; any
slave node must stay within this tolerance for all fields of a frame which
follow the SYNCH FIELD.
Note: For communication between any two nodes their bit rate must not
differ by more than ±2%.
±2.0%