ST72321B STMICROELECTRONICS [STMicroelectronics], ST72321B Datasheet - Page 60

• Manufacturer Part Number: ST72321B
• Description: 64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

10.3 PWM AUTO-RELOAD TIMER (ART)
10.3.1 Introduction
The Pulse Width Modulated Auto-Reload Timer
on-chip peripheral consists of an 8-bit auto reload
counter with compare/capture capabilities and of a
7-bit prescaler clock source.
These resources allow five possible operating
modes:
– Generation of up to 4 independent PWM signals
– Output compare and Time base interrupt
Figure 37. PWM Auto-Reload Timer Block Diagram
60/187
ARTICx
ARTCLK
PWMx
PWMCR
f
f
EXT
CPU
ALTERNATE
FUNCTION
PORT
MUX
ICSx
OEx
f
INPUT
EXCL
INPUT CAPTURE
CONTROL
ICIEx
CC2
REGISTER
PROGRAMMABLE
PRESCALER
ARR
f
COUNTER
POLARITY
CONTROL
CC1
ICFx
OPx
CC0
LOAD
– Up to two input capture functions
– External event detector
– Up to two external interrupt sources
The three first modes can be used together with a
single counter frequency.
The timer can be used to wake up the MCU from
WAIT and HALT modes.
ICCSR
TCE
(CAR REGISTER)
FCRL
8-BIT COUNTER
COMPARE
REGISTER
REGISTER
OCRx
ICRx
ICx INTERRUPT
OIE
OVF
LOAD
LOAD
ARTCSR
REGISTER
OVF INTERRUPT
DCRx