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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC18730EPR2 датащи(PDF) 18 Page - Freescale Semiconductor, Inc |
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MPC18730EPR2 датащи(HTML) 18 Page - Freescale Semiconductor, Inc |
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18 / 35 page  Analog Integrated Circuit Device Data 18 Freescale Semiconductor 18730 FUNCTIONAL DEVICE OPERATION OPERATIONAL MODES capacitor which is connected to V_STDBY. When using Ni_mh, short-circuit VBATT and LVB to external components and HVB to GND. When using Li_ion, short-circuit HVB to VBATT, and leave LVB open. When using Ni_MH, the VB voltage is output from V_STDBY in Standby mode. When using Li-Ion, 50% of the VBATT voltage is output to V_STDBY pin in Standby Mode. RESET CIRCUIT Figure 8. Reset Circuit Block Diagram When the VO1_SENSE or VO2_SENSE voltage is higher than the reference value, PGOOD1 or 2B goes High. When PGOOD1(int) is Low and PGOOD1 is High, SLEEP(int) is forced to place the chip into the standby mode. Connect a capacitor between RESET1_TH and PGOOD_DELAY. The capacitor is not necessary if a resistor of 330K Ω or less is inserted between RESET1_TH and VO1_SENSE for reset adjustment Connect the capacitor between RESET1_TH and PGOOD as directed below. When SEQ_SELECT is Low:Between RESET1_TH and PGOOD1_DELAY When SEQ_SELECT is High:Between RESET1_TH and PGOOD2_DELAY Use a capacitor with approximately half of the capacitance between PGOOD_DELAY and GND Table 8. HVB and LVB Connection MODE HVB LVB Li_ion VBATT(27) open Ni_mh GND VBATT(27) Notes 27. Externally connect to VBATT. Table 9. V_STDBY and LSWO Operation INPUT OUTPUT WAKE(Int) PGOOD2(Int) CLEAR V_STDBY LSWO L X X VBATT Z H L X VBATT Z H H L VO1_SENSE Z H H H VO1_SENSE L Z : High Impedance, X : Don’t care BANDGAP REFERENCE (PGOOD1 side only) PGOOD1, 2 Reset Control PGOOD1_DELAY, PGOOD2_DELAY RESET1_TH PGOOD1, 2B(Int) PGOOD1_DELAY, PGOOD2_DELAY VO1_SENSE VO1_SENSE VO1_SENSE, VO2_SENSE VGATE |
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