ST7FOXK1 STMicroelectronics, ST7FOXK1 Datasheet - Page 97

• Manufacturer Part Number: ST7FOXK1
• Description: Low cost flash 8bit micro
• Manufacturer: STMicroelectronics

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

ST7FOXF1, ST7FOXK1, ST7FOXK2
10.2.4
10.2.5
Note:
Force update
In order not to wait for the counter
programmable counter
which when set, make the counters start with the overflow value, i.e. FFFh. After overflow,
the counters start counting from their respective auto reload register values.
These bits are FORCE1 and FORCE2 in the ATCSR2 register. FORCE1 is used to force an
overflow on Counter 1 and, FORCE2 is used for Counter 2. These bits are set by software
and reset by hardware after the respective counter overflow event has occurred.
This feature can be used at any time. All related features such as PWM generation, Output
Compare, Input Capture, One-pulse (refer to
pulse
Figure 51. Force overflow timing diagram
Low power modes
Table 35.
Interrupts
Table 36.
The AT4 IC is connected to an interrupt vector. The OVF event is mapped on a separate
vector (see Interrupts chapter).
They generate an interrupt if the enable bit is set in the ATCSR register and the interrupt
mask in the CC register is reset (RIM instruction).
FORCE2 FORCE1
Overflow Event2
Interrupt Event
Overflow Event
AT4 IC Event
mode) etc. can be used this way.
Mode
Wait
FORCEx
Halt
CNTRx
f
CNTRx
Effect of low power modes on autoreload timer
Description of interrupt events
ATCSR2 register
E03
x
overflow is provided. For both counters, a separate bit is provided
E04
Event
OVF1
OVF2
Flag
ICF
FFF
x
overflow to load the value into active DCRx registers, a
Control bit
Enable
ARRx
OVIE1
OVIE2
ICIE
Figure 50: Dynamic DCR2/3 update in one
No effect on AT timer
AT timer halted.
Description
Exit from
Wait
Yes
Yes
Yes
Exit from
Halt
No
No
No
On-chip peripherals
Active-Halt
Exit from
Yes
No
No
97/226