ST7FOXK1 STMicroelectronics, ST7FOXK1 Datasheet - Page 95

• 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
Note:
How to enter one pulse mode
The steps required to enter One Pulse mode are the following:
1.
2.
3.
4.
5.
6.
7.
8.
9.
The "Wait for Overflow" in step 6 can be replaced by a forced update.
Follow the same procedure for PWM2 with the bits corresponding to PWM2.
When break is applied in one-pulse mode, CNTR2, DCR2/3 & ATR2 registers are reset. So,
these registers have to be initialized again when break is removed.
Figure 48. Block diagram of one pulse mode
Figure 49. One pulse mode and PWM timing diagram
LTIC pin
PWM3CSR register
Load ATR2H/ATR2L with required value.
Load DCR3H/DCR3L for PWM3. ATR2 value must be greater than DCR3.
Set OP3 in PWM3CSR if polarity change is required.
Select CNTR2 by setting ENCNTR2 bit in ATCSR2.
Set TRAN2 bit in ATCSR2 to enable transfer.
"Wait for Overflow" by checking the OVF2 flag in ATCSR2.
Select counter clock using CK<1:0> bits in ATCSR.
Set OP_EN bit in PWM3CSR to enable one-pulse mode.
Enable PWM3 by OE3 bit of PWMCR.
Note 1: When OP_EN=0, LTIC edges are not taken into account as the timer runs in PWM mode.
f
f
counter2
counter2
CNTR2
LTIC
CNTR2
PWM2/3
PWM2/3
LTIC
Edge
Selection
OPEDGE
OVF
ATR2
000
OP_EN
DCR2/3
DCR2/3
12-bit AutoReload register 2
12-bit Active DCR2/3
OVF
12-bit Upcounter 2
ATR2
000
OP2/3
DCR2/3
DCR2/3
On-chip peripherals
Generation
PWM
OVF
ATR2
ATR2
000
PWM2/3
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