Specifications
Table Of Contents
- Contents
- List of tables
- List of figures
- 1 Description
- 2 Register and memory map
- 3 Flash program memory
- 4 Central processing unit
- 5 Supply, reset and clock management
- 6 Interrupts
- 7 Power saving modes
- 8 I/O ports
- 9 Window watchdog (WWDG)
- 10 Main clock controller with real time clock MCC/RTC
- 11 PWM auto-reload timer (ART)
- 11.1 Introduction
- 11.2 Functional description
- 11.2.1 Counter
- 11.2.2 Counter clock and prescaler
- 11.2.3 Counter and prescaler Initialization
- 11.2.4 Output compare control
- 11.2.5 Independent PWM signal generation
- 11.2.6 Output compare and Time base interrupt
- 11.2.7 External clock and event detector mode
- 11.2.8 Input capture function
- 11.2.9 External interrupt capability
- 11.3 Register description
- 12 16-bit timer
- 12.1 Introduction
- 12.2 Main features
- 12.3 Functional description
- 12.4 Low power modes
- 12.5 Interrupts
- 12.6 Summary of timer modes
- 12.7 Register description
- 12.7.1 Control register 1 (CR1)
- 12.7.2 Control register 2 (CR2)
- 12.7.3 Control/status register (CSR)
- 12.7.4 Input capture 1 high register (IC1HR)
- 12.7.5 Input capture 1 low register (IC1LR)
- 12.7.6 Output compare 1 high register (OC1HR)
- 12.7.7 Output compare 1 low register (OC1LR)
- 12.7.8 Output compare 2 high register (OC2HR)
- 12.7.9 Output compare 2 low register (OC2LR)
- 12.7.10 Counter high register (CHR)
- 12.7.11 Counter low register (CLR)
- 12.7.12 Alternate counter high register (ACHR)
- 12.7.13 Alternate counter low register (ACLR)
- 12.7.14 Input capture 2 high register (IC2HR)
- 12.7.15 Input capture 2 low register (IC2LR)
- 13 8-bit timer (TIM8)
- 13.1 Introduction
- 13.2 Main features
- 13.3 Functional description
- 13.4 Low power modes
- 13.5 Interrupts
- 13.6 Summary of timer modes
- 13.7 Register description
- 13.7.1 Control register 1 (CR1)
- 13.7.2 Control register 2 (CR2)
- 13.7.3 Control/status register (CSR)
- 13.7.4 Input capture 1 register (IC1R)
- 13.7.5 Output compare 1 register (OC1R)
- 13.7.6 Output compare 2 register (OC2R)
- 13.7.7 Counter register (CTR)
- 13.7.8 Alternate counter register (ACTR)
- 13.7.9 Input capture 2 register (IC2R)
- 13.8 8-bit timer register map
- 14 Serial peripheral interface (SPI)
- 15 LINSCI serial communication interface (LIN master/slave)
- 15.1 Introduction
- 15.2 SCI features
- 15.3 LIN features
- 15.4 General description
- 15.5 SCI mode - functional description
- 15.6 Low power modes
- 15.7 Interrupts
- 15.8 SCI mode register description
- 15.9 LIN mode - functional description.
- 15.9.1 Entering LIN mode
- 15.9.2 LIN transmission
- 15.9.3 LIN reception
- 15.9.4 LIN error detection
- 15.9.5 LIN baud rate
- 15.9.6 LIN slave baud rate generation
- 15.9.7 LINSCI clock tolerance
- 15.9.8 Clock deviation causes
- 15.9.9 Error due to LIN synch measurement
- 15.9.10 Error due to baud rate quantization
- 15.9.11 Impact of clock deviation on maximum baud rate
- 15.10 LIN mode register description
- 16 LINSCI serial communication interface (LIN master only)
- 16.1 Introduction
- 16.2 Main features
- 16.3 General description
- 16.4 Functional description
- 16.5 Low power modes
- 16.6 Interrupts
- 16.7 SCI synchronous transmission
- 16.8 Register description
- 16.8.1 Status register (SCISR)
- 16.8.2 Control register 1 (SCICR1)
- 16.8.3 Control register 2 (SCICR2)
- 16.8.4 Control Register 3 (SCICR3)
- 16.8.5 Data register (SCIDR)
- 16.8.6 Baud rate register (SCIBRR)
- 16.8.7 Extended receive prescaler division register (SCIERPR)
- 16.8.8 Extended transmit prescaler division register (SCIETPR)
- 17 10-bit A/D converter (ADC)
- 18 Instruction set
- 19 Electrical characteristics
- 19.1 Parameter conditions
- 19.2 Absolute maximum ratings
- 19.3 Operating conditions
- 19.4 Supply current characteristics
- 19.5 Clock and timing characteristics
- 19.6 Auto wakeup from halt oscillator (AWU)
- 19.7 Memory characteristics
- 19.8 EMC characteristics
- 19.9 I/O port pin characteristics
- 19.10 Control pin characteristics
- 19.11 Timer peripheral characteristics
- 19.12 Communication interface characteristics
- 19.13 10-bit ADC characteristics
- 20 Package characteristics
- 21 Device configuration and ordering information
- 22 Development tools
- 23 Important notes
- 24 Revision history
ST72361xx-Auto Serial peripheral interface (SPI)
Doc ID 12468 Rev 3 151/279
Figure 76. Single master / multiple slave configuration
14.6 Low power modes
Using the SPI to wake up the device from halt mode
In slave configuration, the SPI is able to wake up the device from HALT mode through a
SPIF interrupt. The data received is subsequently read from the SPIDR register when the
software is running (interrupt vector fetch). If multiple data transfers have been performed
before software clears the SPIF bit, then the OVR bit is set by hardware.
Note: When waking up from HALT mode, if the SPI remains in Slave mode, it is recommended to
perform an extra communications cycle to bring the SPI from HALT mode state to normal
state. If the SPI exits from Slave mode, it returns to normal state immediately.
Caution: The SPI can wake up the device from HALT mode only if the Slave Select signal (external
SS
pin or the SSI bit in the SPICSR register) is low when the device enters HALT mode. So,
if Slave selection is configured as external (see Slave select management), make sure the
master drives a low level on the SS
pin when the slave enters HALT mode.
MISO
MOSI
MOSI
MOSI MOSI MOSIMISO MISO MISOMISO
SS
SS
SS
SS
SS
SCK
SCK
SCK
SCK
SCK
5V
Ports
Slave
Device
Slave
Device
Slave
Device
Slave
Device
Master
Device
Table 56. Effect of low power modes on SPI
Mode Description
WAIT
No effect on SPI.
SPI interrupt events cause the device to exit from WAIT mode.
HALT
SPI registers are frozen.
In HALT mode, the SPI is inactive. SPI operation resumes when the device is
woken up by an interrupt with “exit from HALT mode” capability. The data
received is subsequently read from the SPIDR register when the software is
running (interrupt vector fetching). If several data are received before the wake-
up event, then an overrun error is generated. This error can be detected after
the fetch of the interrupt routine that woke up the Device.