ST7FOXK1 STMicroelectronics, ST7FOXK1 Datasheet - Page 54
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ST7FOXK1
Manufacturer Part Number
ST7FOXK1
Description
Low cost flash 8bit micro
Manufacturer
STMicroelectronics
Datasheet
1.ST7FOXK1.pdf
(226 pages)
Specifications of ST7FOXK1
4 To 8 Kbytes Single Voltage Extended Flash (xflash) Program Memory With Read-out Protection In-circuit Programming And In-application Programming (icp And Iap) Endurance
1K write/erase cycles guaranteed Data retention
Clock Sources
Internal trimmable 8 MHz RC oscillator, auto wakeup internal low power - low frequency oscillator, crystal/ceramic resonator or external clock
Five Power Saving Modes
Halt, Active-Halt, Auto Wakeup from Halt, Wait and Slow
A/d Converter
up to 10 input channels
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Interrupts
Note:
7.3
Note:
54/226
Maskable sources
Maskable interrupt vector sources can be serviced if the corresponding interrupt is enabled
and if its own interrupt software priority (in ISPRx registers) is higher than the one currently
being serviced (I1 and I0 in CC register). If any of these two conditions is false, the interrupt
is latched and thus remains pending.
The clearing sequence resets the internal latch. A pending interrupt (that is, waiting for
being serviced) will therefore be lost if the clear sequence is executed.
Interrupts and low power modes
All interrupts allow the processor to exit the Wait low power mode. On the contrary, only
external and other specified interrupts allow the processor to exit from the Halt modes (see
column “Exit from Halt” in
several pending interrupts are present while exiting Halt mode, the first one serviced can
only be an interrupt with exit from Halt mode capability and it is selected through the same
decision process shown in
If an interrupt, that is not able to Exit from Halt mode, is pending with the highest priority
when exiting Halt mode, this interrupt is serviced after the first one serviced.
External interrupts
External interrupts allow the processor to exit from Halt low power mode.
External interrupt sensitivity is software selectable through the External Interrupt
Control register (EICR).
External interrupt triggered on edge will be latched and the interrupt request
automatically cleared upon entering the interrupt service routine.
If several input pins of a group connected to the same interrupt line are selected
simultaneously, these will be logically ORed.
Peripheral interrupts
Usually the peripheral interrupts cause the MCU to exit from Halt mode except those
mentioned in
A peripheral interrupt occurs when a specific flag is set in the peripheral status
registers and if the corresponding enable bit is set in the peripheral control register.
The general sequence for clearing an interrupt is based on an access to the status
register followed by a read or write to an associated register.
Table 17: ST7FOXF1/ST7FOXK1 Interrupt
Table 17: ST7FOXF1/ST7FOXK1 Interrupt
Figure
19.
ST7FOXF1, ST7FOXK1, ST7FOXK2
mapping.
mapping). When
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