Rainbow-electronics DS17487 Uživatelský manuál stáhnout pdf (Strana 14)

DS17485/DS17487

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Table 2. PERIODIC INTERRUPT RATE AND SQUARE-WAVE OUTPUT

FREQUENCY

EXTENDED

SELECT BITS REGISTER A

E32k RS3 RS2 RS1 RS0

PERIODIC

INTERRUPT RATE

SQW OUTPUT

FREQUENCY

0 0 0 0 0 None None

0 0 0 0 1 3.90625ms 256Hz

0 0 0 1 0 7.8125ms 128Hz

0 0 0 1 1 122.070µs 8.192kHz

0 0 1 0 0 244.141µs 4.096kHz

0 0 1 0 1 488.281µs 2.048kHz

0 0 1 1 0 976.5625µs 1.024kHz

0 0 1 1 1 1.953125ms 512Hz

0 1 0 0 0 3.90625ms 256Hz

0 1 0 0 1 7.8125ms 128Hz

0 1 0 1 0 15.625ms 64Hz

0 1 0 1 1 31.25ms 32Hz

0 1 1 0 0 62.5ms 16Hz

0 1 1 0 1 125ms 8Hz

0 1 1 1 0 250ms 4Hz

0 1 1 1 1 500ms 2Hz

1 X X X X * 32.768kHz

*RS3 to RS0 determine periodic interrupt rates as listed for E32k = 0.

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Rainbow-electronics DS17487 Uživatelský manuál Strana 14