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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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MCP2021 数据表(PDF) 8 Page - Microchip Technology |
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MCP2021 数据表(HTML) 8 Page - Microchip Technology |
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8 / 52 page  MCP2021/2/1P/2P DS22018F-page 8 © 2005-2012 Microchip Technology Inc. FIGURE 1-2: MCP2021/2 Operational Modes State Diagrams. FIGURE 1-3: MCP2021P/2P Operational Modes State Diagrams. Power-Down TX: OFF RX: OFF VREG: OFF CS/LWAKE=0 Transmitter Off TX: OFF RX: ON VREG: ON POR TX: OFF RX: OFF VREG: OFF Operation TX: ON RX: ON VREG: ON Ready TX: OFF RX: ON VREG: ON VBAT>5.75V CS/LWAKE=1& VREG_OK=1 CS/LWAKE=0 FAULT/TXE=0 Or Faults* FAULT/TXE=1 &No Faults* CS/LWAKE=1 or dominant level on LBUS Start *Fault: thermal shutdown and TXD/LBUS permanent dominant Note: While the device is in shutdown, TXD should not be actively driven high or it may power internal logic through the ESD diodes and may damage the device. Power-Down TX: OFF RX: OFF VREG: OFF CS/LWAKE=0 Transmitter Off TX: OFF RX: ON VREG: ON POR TX: OFF RX: OFF VREG: OFF Operation TX: ON RX: ON VREG: ON Ready TX: OFF RX: ON VREG: ON VBAT>5.75V CS/LWAKE=1& VREG_OK=1& FAULT/TXE=1 CS/LWAKE=0 FAULT/TXE=0 Or Faults* FAULT/TXE=1 &No Faults* CS/LWAKE=1 or Falling edge on LBUS Start *Fault: thermal shutdown and TXD/LBUS permanent dominant CS=1&VREG_OK=1 &FAULT/TXE=0 |
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