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ST7L09 Datasheet(PDF) 47 Page - STMicroelectronics

Part # ST7L09
Description  8-bit MCU for automotive with single voltage Flash memory, data EEPROM, ADC, timers, SPI
PDF  104 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7L09 Datasheet(HTML) 47 Page - STMicroelectronics

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11.2 12-BIT AUTORELOAD TIMER (AT)
11.2.1 Introduction
The 12-bit Autoreload Timer can be used for gen-
eral-purpose timing functions. It is based on a free-
running 12-bit upcounter with a PWM output chan-
nel.
11.2.2 Main Features
■ 12-bit upcounter with 12-bit autoreload register
(ATR)
■ Maskable overflow interrupt
■ PWM signal generator
■ Frequency range 2 kHz to 4 MHz (@ 8 MHz
fCPU)
– Programmable duty-cycle
– Polarity control
– Maskable Compare interrupt
■ Output Compare Function
Figure 28. Block Diagram
ATCSR
CMPIE
OVFIE
OVF
CK0
CK1
0
0
0
12-BIT AUTORELOAD VALUE
12-BIT UPCOUNTER
CMPF0 bit
CMPF0
CMP INTERRUPT
REQUEST
OVF INTERRUPT
REQUEST
fCPU
ATR
POL-
ARITY
OP0 bit
PWM0
COMP-
PARE
fCOUNTER
fPWM
OE0 bit
CNTR
(1 ms timebase
fLTIMER
DCR0H
DCR0L
Update on OVF Event
Preload
Preload
@ 8 MHz)
70
on OVF Event
0
1
12-BIT DUTY CYCLE VALUE (shadow)
OE0 bit
IF OE0= 1
1



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