ST72325_07 datasheet(71/196 Pages) STMICROELECTRONICS

Part #	ST72325

Description	8-bit MCU with 16 to 60K Flash/ROM, ADC, CSS, 5 timers, SPI, SCI, I2C interface

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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ON-CHIP PERIPHERALS (Cont’d)

INPUT CAPTURE

CONTROL / STATUS REGISTER (ARTICCSR)

Read/Write

Reset Value: 0000 0000 (00h)

Bit 7:6 = Reserved, always read as 0.

Bit 5:4 = CS[2:1] Capture Sensitivity

These bits are set and cleared by software. They

determine the trigger event polarity on the corre-

sponding input capture channel.

0: Falling edge triggers capture on channel x.

1: Rising edge triggers capture on channel x.

Bit 3:2 = CIE[2:1] Capture Interrupt Enable

These bits are set and cleared by software. They

enable or disable the Input capture channel inter-

rupts independently.

0: Input capture channel x interrupt disabled.

1: Input capture channel x interrupt enabled.

Bit 1:0 = CF[2:1] Capture Flag

These bits are set by hardware and cleared by

software reading the corresponding ARTICRx reg-

ister. Each CFx bit indicates that an input capture x

has occurred.

0: No input capture on channel x.

1: An input capture has occurred on channel x.

INPUT CAPTURE REGISTERS (ARTICRx)

Read only

Reset Value: 0000 0000 (00h)

Bit 7:0 = IC[7:0] Input Capture Data

These read only bits are set and cleared by hard-

ware. An ARTICRx register contains the 8-bit

auto-reload counter value transferred by the input

capture channel x event.

70

0

CS2

CS1

CIE2

CIE1

CF2

CF1

70

IC7

IC6

IC5

IC4

IC3

IC2

IC1

IC0

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