ST72324BK2 STMicroelectronics, ST72324BK2 Datasheet - Page 80

• Manufacturer Part Number: ST72324BK2
• Description: 5V RANGE 8-BIT MCU WITH 8 TO 32K FLASH/ROM, 10-BIT ADC, 4 TIMERS, SPI, SCI INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72324BK2

• Hdflash Endurance: 1 kcycle at 55 °C, data retention 40 years at 85 °C
• Clock Sources: crystal/ceramic resonator oscillators, int. RC osc. and ext. clock input
• 4 Power Saving Modes: Slow, Wait, Active-halt, and Halt

On-chip peripherals
Note:
80/193
1
2
3
4
5
6
After reading the ICiHR register, transfer of input capture data is inhibited and ICFi will never
be set until the ICiLR register is also read.
The ICiR register contains the free running counter value which corresponds to the most
recent input capture.
The two input capture functions can be used together even if the timer also uses the two
output compare functions.
In One pulse mode and PWM mode only Input Capture 2 can be used.
The alternate inputs (ICAP1 and ICAP2) are always directly connected to the timer. So any
transitions on these pins activates the input capture function.
Moreover if one of the ICAPi pins is configured as an input and the second one as an output,
an interrupt can be generated if the user toggles the output pin and if the ICIE bit is set.
This can be avoided if the input capture function i is disabled by reading the ICiHR (see
note 1).
The TOF bit can be used with interrupt generation in order to measure events that go
beyond the timer range (FFFFh).
Figure 41. Input capture block diagram
Figure 42. Input capture timing diagram
ICAP2
ICAP1
pin
pin
Counter register
Note: The rising edge is the active edge.
ICAPi register
16-bit
Timer clock
ICAPi flag
IC2R register
16-bit free running counter
ICAPi pin
Edge Detect
circuit 2
FF01
Edge Detect
circuit 1
IC1R register
FF02
ICF1
ICIE
FF03
ICF2
FF03
(Control register 1) CR1
(Control register 2) CR2
CC1
(Status register) SR
CC0
0
ST72324Bxx
IEDG1
IEDG2
0
0