Q67121-C1068 데이터 시트보기 (PDF) - Infineon Technologies

부품명

상세내역

제조사

Q67121-C1068

8-Bit CMOS Microcontroller

Infineon Technologies 

C515A

Timer 2 Compare Modes

The compare function of a timer/register combination operates as follows: the 16-bit value stored in

a compare or compare/capture register is compared with the contents of the timer register; if the

count value in the timer register matches the stored value, an appropriate output signal is generated

at a corresponding port pin and an interrupt can be generated.

Compare Mode 0

In compare mode 0, upon matching the timer and compare register contents, the output signal

changes from low to high. It goes back to a low level on timer overflow. As long as compare mode 0

is enabled, the appropriate output pin is controlled by the timer circuit only and writing to the port

will have no effect. Figure 11 shows a functional diagram of a port circuit when used in compare

mode 0. The port latch is directly controlled by the timer overflow and compare match signals. The

input line from the internal bus and the write-to-latch line of the port latch are disconnected when

compare mode 0 is enabled.

Port Circuit

Compare Register

Circuit

Compare Reg.

16 Bit

Comparator

16 Bit

Timer Register

Timer Circuit

Compare

Match

Timer

Overflow

Internal

Bus

Write to

Latch

Figure 11

Port Latch in Compare Mode 0

Read Latch

VCC

S

D

Port

Q

Port

Pin

Latch

CLK

R

Q

Read Pin

MCS02661

Semiconductor Group

27

1997-10-01

Share Link: