ST72521R9-Auto STMicroelectronics, ST72521R9-Auto Datasheet - Page 189

• Manufacturer Part Number: ST72521R9-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72521R9-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• 4 Power Saving Modes: Halt, Active Halt, Wait and Slow

ST72521xx-Auto
Receive error counter register (RECR)
Table 100. RECR register description
Identifier high registers (IDHRx)
Table 101. IDHRx register description
RECR
7:0 REC[7:0]
IDHRx
7:0
Bit
Bit
7
7
ID[10:3]
Name
Name
Receive Error Counter
Message Identifier (MSB)
6
6
This is the Receive Error Counter implementing part of the fault confinement
mechanism of the CAN protocol. In case of an error during reception, this counter
is incremented by 1 or by 8 depending on the error condition as defined by the
CAN standard. After every successful reception the counter is decremented by 1
or reset to 120 if its value was higher than 128. When the counter value exceeds
127, the CAN controller enters the error passive state.
These are the most significant 8 bits of the 11-bit message identifier. The identifier
acts as the message’s name, used for bus access arbitration and acceptance
filtering.
5
5
Doc ID 17660 Rev 1
4
4
REC[7:0]
ID[10:3]
R/W
RO
Function
Function
3
3
Controller area network (CAN)
2
2
Reset value: Undefined
1
1
Reset value: 00h
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0
0