ST72521AR9 STMicroelectronics, ST72521AR9 Datasheet - Page 131

• Manufacturer Part Number: ST72521AR9
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72521AR9

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock
• Four Power Saving Modes: Halt, Active-Halt, Wait and Slow
• Main Clock Controller With: Real time base, Beep and Clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, external clock input on one timer, PWM and pulse generator modes
• 8-bit Pwm Auto-reload Timer With: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector

CONTROLLER AREA NETWORK (Cont’d)
Figure 69. CAN Frames
Overload Delimiter
Error Delimiter or
End Of Frame or
Remote Frame
Data Frame or
Any Frame
Inter-Frame Space
Inter-Frame Space
Intermission
Overload Flag
Error Flag
3
Arbitration Field
Arbitration Field
6
6
Overload Frame
Transmission
Inter-Frame Space
Suspend
ID
ID
Flag Echo
12
12
Error Frame
8
Overload Delimiter
≤ 6
8
Control Field
Control Field
Error Delimiter
Bus Idle
Inter-Frame Space
or Error Frame
8
6
6
DLC
DLC
Remote Frame
Data Frame or
Remote Frame
or Overload Frame
Inter-Frame Space
Data Field
44
8 * N
Data Frame
44 + 8 * N
CRC Field
CRC
16
CRC Field
Ack Field
CRC
Notes:
• 0
• SOF = Start Of Frame
• ID = Identifier
• RTR = Remote Transmission Request
• IDE = Identifier Extension Bit
• r0 = Reserved Bit
• DLC = Data Length Code
• CRC = Cyclic Redundancy Code
• Error flag: 6 dominant bits if node is error
• Suspend transmission: applies to error
• EOF = End of Frame
• ACK = Acknowledge bit
16
active else 6 recessive bits.
passive nodes only.
2
End Of Frame
7
<= N
ST72F521, ST72521B
Ack Field
2
or Overload Frame
Inter-Frame Space
or Overload Frame
Inter-Frame Space
EOF
7
<= 8
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