ST10F271Z1Q3 datasheet(57/185 Pages) STMICROELECTRONICS

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ST10F271Z1

Capture / compare (CAPCOM) units

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Table 31.

Compare modes

Compare

modes

Function

Mode 0

Interrupt-only compare mode; several compare interrupts per timer period are

possible

Mode 1

Pin toggles on each compare match; several compare events per timer period are

possible

Mode 2

Interrupt-only compare mode; only one compare interrupt per timer period is

generated

Mode 3

Pin set ‘1’ on match; pin reset ‘0’ on compare time overflow; only one compare

event per timer period is generated

Double register

mode

Two registers operate on one pin; pin toggles on each compare match; several

compare events per timer period are possible.

Table 32.

CAPCOM timer input frequencies, resolutions and periods at 40 MHz

fCPU = 40 MHz

Timer input selection TxI

000b

001b

010b

011b

100b

101b

110b

111b

Prescaler for

fCPU

128

256

512

1024

Input frequency

5 MHz

2.5 MHz

1.25

MHz

625 kHz

312.5

kHz

156.25

kHz

78.125

kHz

39.1

kHz

Resolution

200 ns

400 ns

0.8 µs

1.6 µs

3.2 µs

6.4 µs

12.8 µs

25.6 µs

Period

13.1 ms 26.2 ms

52.4 ms

104.8

209.7 ms 419.4 ms 838.9 ms

1.678 s

Table 33.

CAPCOM timer input frequencies, resolutions and periods at 64 MHz

fCPU = 64 MHz

Timer input selection TxI

000b

001b

010b

011b

100b

101b

110b

111b

Prescaler for fCPU

128

256

512

1024

Input frequency

8 MHz

4 MHz

2 MHz

1 kHz

500 kHz

250 kHz

128 kHz

64 kHz

Resolution

125 ns

250 ns

0.5 µs

1.0 µs

2.0 µs

4.0 µs

8.0 µs

16.0 µs

Period

8.2 ms

16.4

32.8 ms 65.5 ms

131.1

262.1 ms 524.3 ms

1.049 s

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