ST7PLITEU09M3TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST7PLITEU09M3TR

8-bit MCU with single voltage Flash memory, ADC, timers

STMicroelectronics 

ST7LITEU05 ST7LITEU09

LITE TIMER (Cont’d)

Input Capture

The 8-bit input capture register is used to latch the

free-running upcounter after a rising or falling edge

is detected on the LTIC pin. When an input capture

occurs, the ICF bit is set and the LTICR register

contains the MSB of the free-running upcounter.

An interrupt is generated if the ICIE bit is set. The

ICF bit is cleared by reading the LTICR register.

The LTICR is a read only register and always con-

tains the data from the last input capture. Input

capture is inhibited if the ICF bit is set.

11.1.4 Low Power Modes

Mode

WAIT

ACTIVE-HALT

HALT

Description

No effect on Lite timer

No effect on Lite timer

Lite timer stops counting

11.1.5 Interrupts

Interrupt

Event

Timebase

Event

IC Event

Event

Flag

TBF

ICF

Enable

Control

Bit

TBIE

ICIE

Exit Exit

from from

Wait Halt

Yes No

Yes No

Exit

from

Active-

Halt

Yes

No

Note: The TBF and ICF interrupt events are con-

nected to separate interrupt vectors (see Inter-

rupts chapter).

They generate an interrupt if the enable bit is set in

the LTCSR register and the interrupt mask in the

CC register is reset (RIM instruction).

Figure 36. Input Capture Timing Diagram

125ns

(@ 8MHz fOSC)

fCPU

fOSC

13-bit COUNTER 0001h 0002h 0003h 0004h 0005h 0006h 0007h

LTIC PIN

ICF FLAG

LTICR REGISTER

xxh

04h

CLEARED

BY S/W

READING

LTIC REGISTER

07h

t

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