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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LPC47M14X датащи(PDF) 199 Page - SMSC Corporation |
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LPC47M14X датащи(HTML) 199 Page - SMSC Corporation |
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199 / 205 page  SMSC DS – LPC47M14X Page 199 Rev. 03/19/2001 FIGURE 45 – FAN OUTPUT TIMING NAME DESCRIPTION MIN TYP MAX UNITS t1 PWM Period (Note 1) 0.021 25.5 msec t2 PWM High Time (Note 2) 0.00033 25.1 msec Note 1: The period is 1/fout,where fout is programmed through the FANx and Fan Control registers. The tolerance on fout is +/- 2%. Note 2: When Bit 0 of the FANx registers is 0, then the duty cycle is programmed through Bits[6:1] of these registers. If Bits[6:1] = “000000” then the FANx pin is low. The duty cycle is programmable through Bits[6:1] to be between 1.56% and 98.44%. When Bit 0 is 1, the FANx pin is high. t3 t1 t2 FAN_TACHx FIGURE 46 – FAN TACHOMETER INTPUT TIMING NAME DESCRIPTION MIN TYP MAX UNITS t1 Pulse Time (1/2 Revolution Time=30/RPM) 4tTACH 1 µsec t2 Pulse High Time 3tTACH 1 µsec t3 Pulse Low Time tTACH µsec Note 1: tTACH is the clock used for the tachometer counter. It is 30.52 * DVSR, where the divisor (DVSR) is programmed in the Fan Control register. t2 t1 LEDx FIGURE 47 – LED OUTPUT TIMING NAME DESCRIPTION MIN TYP MAX UNITS t1 Period 1 2 sec t2 Blink ON Time 0 0.5 1 sec Note 1: The blink rate is programmed through Bits[1:0] in LEDx register. When Bits[1:0]=00, LED is OFF. Bits[1:0]=01 indicates LED blink at 1Hz rate with a 50% duty cycle (0.5 sec ON, 0.5 sec OFF). Bits[1:0]=10 indicates LED blink at ½ Hz rate with a 25% duty cycle (0.5 sec ON, 1.5 sec OFF). When Bits[1:0]=11, LED is ON. t1 t2 FANx |
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