ST72521R9-Auto STMicroelectronics, ST72521R9-Auto Datasheet - Page 8
ST72521R9-Auto
Manufacturer Part Number
ST72521R9-Auto
Description
8-bit MCU for automotive
Manufacturer
STMicroelectronics
Datasheet
1.ST72521R9-AUTO.pdf
(276 pages)
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
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Contents
17
18
8/276
Controller area network (CAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
17.1
17.2
17.3
17.4
17.5
10-bit A/D converter (ADC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
18.1
18.2
18.3
18.4
18.5
18.6
16.7.2
16.7.3
16.7.4
16.7.5
16.7.6
16.7.7
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
17.3.1
17.3.2
17.3.3
17.3.4
Register description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
17.4.1
17.4.2
List of CAN cell limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
17.5.1
17.5.2
17.5.3
17.5.4
17.5.5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
18.3.1
18.3.2
18.3.3
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
ADC registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
18.6.1
I2C status register 1 (SR1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
I2C status register 2 (SR2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
I2C clock control register (CCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
I2C data register (DR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
I2C own address register (OAR1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
I2C own address register (OAR2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Frame formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Hardware blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Modes of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Bit timing logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
General purpose registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Paged registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Omitted SOF bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
CPU write access (more than one cycle) corrupts CAN frame . . . . . . 196
Unexpected message transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
WKPS functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Bus-off state not entered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
A/D converter configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Starting the conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
Changing the conversion channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Control/status register (ADCCSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Doc ID 17660 Rev 1
ST72521xx-Auto
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