ST72F324BK4T3 STMicroelectronics, ST72F324BK4T3 Datasheet - Page 81

• Manufacturer Part Number: ST72F324BK4T3
• Description: IC MCU 8BIT 16K FLASH 32-TQFP
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72F324BK4T3

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 3.8 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 32-TQFP, 32-VQFP
• Processor Series: ST72F3x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7232X-EVAL, ST7MDT20-DVP3, ST7MDT20J-EMU3, STX-RLINK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• A/d Bit Size: 10 bit
• A/d Channels Available: 12
• Height: 1.4 mm
• Length: 7 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 3.8 V
• Width: 7 mm
• For Use With: 497-6421 - BOARD EVAL DGTL BATT CHGR DESIGN497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 497-8241; ST72F324BK4T3

ST72324B-Auto
Output compare
In this section, the index, i, may be 1 or 2 because there are two output compare functions in
the 16-bit timer.
This function can be used to control an output waveform or indicate when a period of time
has elapsed.
When a match is found between the Output Compare register and the free running counter,
the output compare function:
●
●
●
Two 16-bit registers Output Compare register 1 (OC1R) and Output Compare register 2
(OC2R) contain the value to be compared to the counter register each timer clock cycle.
Table 45.
These registers are readable and witable and are not affected by the timer hardware. A
reset event changes the OC
Timing resolution is one count of the free running counter: (f
Procedure
To use the Output Compare function, select the following in the CR2 register:
●
●
And select the following in the CR1 register:
●
●
When a match is found between OCRi register and CR register:
●
●
●
The OC
the following formula:
Where:
t
f
PRESC = Timer prescaler factor (2, 4 or 8 depending on CC[1:0] bits; see
CPU
Assigns pins with a programmable value if the OCiE bit is set
Sets a flag in the status register
Generates an interrupt if enabled
Set the OCiE bit if an output is needed then the OCMPi pin is dedicated to the output
compare i signal.
Select the timer clock (CC[1:0]) (see
Select the OLVLi bit to applied to the OCMPi pins after the match occurs.
Set the OCIE bit to generate an interrupt if it is needed.
OCFi bit is set
The OCMPi pin takes OLVLi bit value (OCMPi pin latch is forced low during reset)
A timer interrupt is generated if the OCIE bit is set in the CR1 register and the I bit is
cleared in the CC register (CC).
i
R register value required for a specific timing application can be calculated using
= Output compare period (in seconds)
= CPU clock frequency (in hertz)
Register
Output compare byte distribution
OCiR
i
R value to 8000h.
Doc ID13466 Rev 4
 OCiR =
Table
MS byte
OCiHR
t
PRESC
*
f
50).
CPU
CPU
/CC[1:0]).
On-chip peripherals
LS byte
OCiLR
Table
50)
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