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L6238S 数据表(PDF) 11 Page - STMicroelectronics |
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L6238S 数据表(HTML) 11 Page - STMicroelectronics |
11 / 31 page Bemf. This resychronization can either occur whenever Output Enable or Run/Brake is first brought low then high. Referring to figure 2-4, the ”Hold for Resync” state is brought low. The controller leaves this state and enters ”Start Resync” when Output En- able is high. S Q Q TO START-UP LOGIC S OVER TEMP SHUTDOWN D95IN311 OUTPUT ENABLE RUN/ BRAKE FALIGN Figure 2.3: Watch-Dog Timer LOAD MIN DELAY LOAD MIN MASK*** DELAY COUNT STATE=STATE+1 MASK COUNT LOAD DELAY=MIN LOAD MASK=MIN PERIOD COUNT DELAY COUNT* STATE=STATE+1 MASK COUNT CHECK FOR Zc OUTENA=1 BEMF DRIVERS OFF MIN CLOCK DELAY PERIOD STOP D95IN312 *CLOCK DELAY=(TDLY [2:0] WHEN BEMF PERIOD <3.3ms @ 10MHz (SPEED>12.7Hz FOR 8 POLES) BEMF: BEMF RISING WITH PNSLOPE=1 OR BEMF FALLING WITH PNSLOPE=0 BEMF: BEMF RISING WITH PNSLOPE=0 OR BEMF FALLING WITH PNSLOPE=1 ** MONO=0 WHEN FREQ (BEMF)=2*FREQ(PHASE) *** MIN MASK=192/SYS_CLK(I.E.WITH SYS_CLK=10MHz, MIN MASK=19.2 µs) BEMF RUN/BRK=0 BEMF BEMF DRIVERS OFF DRIVERS ON LOAD DELAY=PERIOD LOAD MASK=PERIOD RESET PERIOD PERIOD COUNT DELAYH COUNT* STATE=STATE+1 MASK COUNT MONO=0** BEMF BEMF RUN MODE OUTENA=0 OUTENA=1 HOLD FOR RESYNC RESYNCHRONIZATION MODE Figure 2-4 STATE=1 DRIVERS OFF MIN CLOCK DELAY PERIOD STOP DELAY STOP MASK STOP DRIVERS OFF MIN CLOCK DELAY LOAD MIN DELAY LOAD MIN MASK PERIOD STOP DELAY COUNT STATE=STATE+1 MASK COUNT CHECK FOR Zc DRIVERS ON PERIOD STOP DELAY STOP MASK STOP STATE=STATE+1 LOAD DELAY=MIN LOAD MASK=MAX PERIOD COUNT DELAY COUNT STATE=STATE+1 MASK COUNT CHECK FOR Zc BEMF 221 SYS_CLK RUN/BRAKE=1 POR=0 FROM ANY STATE OUTENA=1 64/FALIGN 192/FALIGN DRIVERS ON LOAD DELAY=PERIOD LOAD MASK=PERIOD RESET PERIOD PERIOD COUNT DELAY COUNT* STATE=STATE+1 MASK COUNT BEMF D95IN310 BEMF: BEMF RISING WITH PNSLOPE=1 OR BEMF FALLING WITH PNSLOPE=0 BEMF: BEMF RISING WITH PNSLOPE=0 OR BEMF FALLING WITH PNSLOPE=1 ***MIN MASK=192/SYS_CLK (I.E. WITH SYS_CLK=10MHz, MIN MASK=19.2 µs) BEMF RUN/BRK=0 FROM ANY STATE Figure 2.2 L6238S 11/31 |
类似零件编号 - L6238S |
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类似说明 - L6238S |
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