ST7DALIF2 STMicroelectronics, ST7DALIF2 Datasheet - Page 74

• Manufacturer Part Number: ST7DALIF2
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
• Manufacturer: STMicroelectronics

Specifications of ST7DALIF2

• 8 Kbytes Single Voltage Flash Program Memory With Read-out Protection, In-circuit Programming And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• 256 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• Clock Sources: Internal 1% RC oscillator, crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-Halt, Wait and Slow, Auto Wake Up From Halt

12-bit autoreload timer 2 (AT2)
Note:
74/171
the upcounter matches the DCRx value the PWMx signals are set to a low level. To obtain a
signal on a PWMx pin, the contents of the corresponding DCRx register must be greater
than the contents of the ATR register.
The polarity bits can be used to invert any of the four output signals. The inversion is
synchronized with the counter overflow if the TRAN bit in the TRANCR register is set (reset
value). See
Figure 34. PWM inversion diagram
The maximum available resolution for the PWMx duty cycle is:
Resolution = 1 / (4096 - ATR)
To get the maximum resolution (1/4096), the ATR register must be 0. With this maximum
resolution, 0% and 100% can be obtained by changing the polarity.
Figure 35. PWM function
AUTO-RELOAD
DUTY CYCLE
WITH OE=1
AND OPx=0
REGISTER
REGISTER
WITH OE=1
AND OPx=1
(DCRx)
(ATR)
Figure
4095
000
34.
TRANCR Register
PWMxCSR Register
PWMx
TRAN
OPx
overflow
counter
DFF
inverter
PWMx
PIN
ST7DALIF2
t