ST92250CV2Q-Auto STMicroelectronics, ST92250CV2Q-Auto Datasheet - Page 201
ST92250CV2Q-Auto
Manufacturer Part Number
ST92250CV2Q-Auto
Description
8-bit MCU for automotive
Manufacturer
STMicroelectronics
Datasheet
1.ST92150JDV1QAUTO.pdf
(430 pages)
Specifications of ST92250CV2Q-Auto
Internal Memory
Single Voltage FLASH up to 256 Kbytes, RAM up to 8Kbytes, 1K byte E3 TM (Emulated EEPROM)
Minimum Instruction Time
83 ns (24 MHz int. clock)
- Current page: 201 of 430
- Download datasheet (7Mb)
MULTIFUNCTION TIMER (Cont’d)
10.4.5.6 DMA End Of Block Interrupt Routine
An interrupt request is generated after each block
transfer (EOB) and its priority is the same as that
assigned in the usual interrupt request, for the two
channels. As a consequence, they will be serviced
only when no DMA request occurs, and will be
subject to a possible OUF Interrupt request, which
has higher priority.
The following is a typical EOB procedure (with
swap mode enabled):
– Test Toggle bit and Jump.
– Reload Pointers (odd or even depending on tog-
– Reset EOB bit: this bit must be reset only after
– Verify the software protection condition (see
– Read the corresponding Overrun bit: this con-
– Reset the corresponding pending bit.
– Reenable DMA with the corresponding DMA
gle bit status).
the old pair of pointers has been restored, so
that, if a new EOB condition occurs, the next pair
of pointers is ready for swapping.
Section
firms that no DMA request has been lost in the
meantime.
mask bit (must always be done after resetting
the pending bit)
10.4.5.7).
ST92124xxx-Auto/150xxxxx-Auto/250xxxx-Auto
– Return.
WARNING: The EOB bits are read/write only for
test purposes. Writing a logical “1” by software
(when the SWEN bit is set) will cause a spurious
interrupt request. These bits are normally only re-
set by software.
10.4.5.7 DMA Software Protection
A second EOB condition may occur before the first
EOB routine is completed, this would cause a not
yet updated pointer pair to be addressed, with con-
sequent overwriting of memory. To prevent these
errors, a protection mechanism is provided, such
that the attempted setting of the EOB bit before it
has been reset by software will cause the DMA
mask on that channel to be reset (DMA disabled),
thus blocking any further DMA operation. As
shown above, this mask bit should always be
checked in each EOB routine, to ensure that all
DMA transfers are properly served.
10.4.6 Register Description
Note: In the register description on the following
pages, register and page numbers are given using
the example of Timer 0. On devices with more
than one timer, refer to the device register map for
the adresses and page numbers.
201/430
9
Related parts for ST92250CV2Q-Auto
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
STMicroelectronics [RIPPLE-CARRY BINARY COUNTER/DIVIDERS]
Manufacturer:
STMicroelectronics
Datasheet:
Part Number:
Description:
STMicroelectronics [LIQUID-CRYSTAL DISPLAY DRIVERS]
Manufacturer:
STMicroelectronics
Datasheet:
Part Number:
Description:
BOARD EVAL FOR MEMS SENSORS
Manufacturer:
STMicroelectronics
Datasheet:
Part Number:
Description:
NPN TRANSISTOR POWER MODULE
Manufacturer:
STMicroelectronics
Datasheet:
Part Number:
Description:
TURBOSWITCH ULTRA-FAST HIGH VOLTAGE DIODE
Manufacturer:
STMicroelectronics
Datasheet:
Part Number:
Description:
Manufacturer:
STMicroelectronics
Datasheet:
Part Number:
Description:
DIODE / SCR MODULE
Manufacturer:
STMicroelectronics
Datasheet:
Part Number:
Description:
DIODE / SCR MODULE
Manufacturer:
STMicroelectronics
Datasheet:
Part Number:
Description:
Search -----> STE16N100
Manufacturer:
STMicroelectronics
Datasheet:
Part Number:
Description:
Search ---> STE53NA50
Manufacturer:
STMicroelectronics
Datasheet:
Part Number:
Description:
NPN Transistor Power Module
Manufacturer:
STMicroelectronics
Datasheet:
Part Number:
Description:
DIODE / SCR MODULE
Manufacturer:
STMicroelectronics
Datasheet: