ST7-STICK45 STMICROELECTRONICS [STMicroelectronics], ST7-STICK45 Datasheet - Page 53

• Manufacturer Part Number: ST7-STICK45
• Description: 8-bit microcontroller with single voltage Flash memory, data EEPROM, ADC, timers, SPI
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

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
■
■
Figure 34. Block Diagram
12-BIT DUTY CYCLE VALUE (shadow)
Preload
DCR0H
12-bit upcounter with 12-bit autoreload register
(ATR)
Maskable overflow interrupt
f
(1 ms timebase
@ 8MHz)
LTIMER
f
CPU
Preload
DCR0L
on OVF Event
IF OE0=1
0
7
ATCSR
0
0
f
COUNTER
CK1
OE0 bit
1
0
CNTR
ATR
CK0
CMPF0 bit
COMP-
PARE
12-BIT AUTORELOAD VALUE
OVF
■
■
■
12-BIT UPCOUNTER
– Programmable duty-cycle
– Polarity control
– Maskable Compare interrupt
PWM signal generator
Frequency range 2KHz-4MHz (@ 8 MHz f
Output Compare Function
OVFIE
CMPIE
CMPF0
0
ST7LITE0xY0, ST7LITESxY0
Update on OVF Event
OVF INTERRUPT
REQUEST
f
PWM
OP0 bit
POL-
ARITY
OE0 bit
CMP INTERRUPT
REQUEST
PWM0
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CPU
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