ST72344S4 STMicroelectronics, ST72344S4 Datasheet - Page 93

• Manufacturer Part Number: ST72344S4
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST72344S4

• Up To 16 Kbytes Program Memory: single voltage extended Flash (XFlash) with readout and write protection, in-circuit and inapplication programming (ICP and IAP). 10K write/erase cycles guaranteed, data retention
• 256 Bytes Data Eeprom With Readout Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55 °C.
• Clock Sources: crystal/ceramic resonator oscillators, high-accuracy internal RC oscillator or external clock
• 5 Power-saving Modes: Slow, Wait, Halt, Auto-wakeup from Halt and Active-halt
• 16-bit Timer A With: 1 input capture, 1 output compares, external clock input, PWM and pulse generator modes
• 16-bit Timer B With: 2 input captures, 2 output compares, PWM and pulse generator modes

ST72344xx ST72345xx
11.3
11.3.1
11.3.2
Note:
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 devices of the ST7 family have two on-chip 16-bit timers. They are completely
independent, and do not share any resources. They are synchronized after a Device reset
as long as the timer clock frequencies are not modified.
This description covers one or two 16-bit timers. In the 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 available (not bonded) in some devices. Refer to the device pin out
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
Output compare functions with
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–
–
–
Input capture functions with
–
–
–
–
Pulse width modulation mode (PWM)
One-pulse mode
Reduced-power mode
5 alternate functions on I/O ports (ICAP1, ICAP2, OCMP1, OCMP2, EXTCLK). See
note below.
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
Doc ID 12321 Rev 5
Figure
CPU
divided by 2, 4 or 8.
42.
On-chip peripherals
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