st72324bk STMicroelectronics, st72324bk Datasheet - Page 66

• Manufacturer Part Number: st72324bk
• Description: 3 V/5 V Range 8-bit Mcu With 4/8 Kbyte Rom, 10-bit Adc, Four Timers And Spi
• Manufacturer: STMicroelectronics

On-chip peripherals
9.3
9.3.1
9.3.2
Note:
66/167
16-bit timer
Introduction
The timer consists of a 16-bit free-running counter driven by a programmable prescaler.
It may be used for a variety of purposes, including pulse length measurement of up to two
input signals (input capture) or generation of up to two output waveforms (output compare
and PWM).
Pulse lengths and waveform periods can be modulated from a few microseconds to several
milliseconds using the timer prescaler and the CPU clock prescaler.
Some ST7 devices have two on-chip 16-bit timers. They are completely independent, and
do not share any resources. They are synchronized after a MCU reset as long as the timer
clock frequencies are not modified.
This description covers one or two 16-bit timers. In ST7 devices with two timers, register
names are prefixed with TA (Timer A) or TB (Timer B).
Main features
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The block diagram is shown in
Some timer pins may not be available (not bonded) in some ST7 devices. Refer to the
device pinout description.
When reading an input signal on a non-bonded pin, the value will always be ‘1’.
Programmable prescaler: f
Overflow status flag and maskable interrupt
External clock input (must be at least 4 times slower than the CPU clock speed) with
the choice of active edge
1 or 2 Output Compare functions each with:
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–
–
–
1 or 2 Input Capture functions each with:
–
–
–
–
Pulse width modulation mode (PWM)
One pulse mode
Reduced Power mode
5 alternate functions on I/O ports (ICAP1, ICAP2, OCMP1, OCMP2, EXTCLK)*
2 dedicated 16-bit registers
2 dedicated programmable signals
2 dedicated status flags
1 dedicated maskable interrupt
2 dedicated 16-bit registers
2 dedicated active edge selection signals
2 dedicated status flags
1 dedicated maskable interrupt
Figure
CPU
divided by 2, 4 or 8.
30.
ST72323 ST72323L