ST10F271 datasheet(57/173 Pages) STMICROELECTRONICS

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ST10F271

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

Pre-scaler for

fCPU

128

256

512

1024

Input Frequency

5MHz

2.5MHz 1.25MHz 625 kHz

312.5

kHz

156.25

kHz

78.125

kHz

39.1

kHz

Resolution

200ns

400ns

0.8µs

1.6µs

3.2µs

6.4µs

12.8µs

25.6µs

Period

13.1ms

26.2ms

52.4ms

104.8

209.7ms

419.4ms

838.9ms

1.678s

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

Pre-scaler for

fCPU

128

256

512

1024

Input Frequency

8MHz

4MHz

2MHz

1 kHz

500 kHz

250 kHz

128 kHz

64 kHz

Resolution

125ns

250ns

0.5µs

1.0µs

2.0µs

4.0µs

8.0µs

16.0µs

Period

8.2ms

16.4ms

32.8ms

65.5ms 131.1ms 262.1ms

524.3ms

1.049s

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