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R8C/2G 数据表(PDF) 53 Page - Renesas Technology Corp |
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R8C/2G 数据表(HTML) 53 Page - Renesas Technology Corp |
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53 / 344 page  R8C/2G Group 6. Voltage Detection Circuit Rev.1.00 Apr 04, 2008 Page 33 of 318 REJ09B0387-0100 Figure 6.1 Block Diagram of Voltage Detection Circuit Figure 6.2 Block Diagram of Voltage Monitor 0 Reset Generation Circuit + - b3 + - VCA25 + - b3 ≥ Vdet2 Internal reference voltage VCA27 VCA26 VCC Voltage detection 1 signal VCA13 bit Voltage detection 2 signal Voltage detection 0 signal ≥ Vdet1 ≥ Vdet0 VCA1 register VW1C3 bit VW1C register Noise filter Noise filter VCMP2 VCAB6 = 1 VCAB6 = 0 VCMP1 VCAB5 = 1 VCAB5 = 0 VCA13: Bit in VCA1 register VCA25, VCA26, VCA27: Bits in VCA2 register VW1C3: Bit in VW1C register VCAB5, VCAB6: Bits in VCAB register Shared with comparator + - 1/2 1/2 1/2 Voltage detection 0 circuit VCA25 VCC Internal reference voltage Voltage detection 0 signal is held “H” when VCA25 bit is set to 0 (disabled) Voltage detection 0 signal fOCO-S VW0F1 to VW0F0 = 00b = 01b = 10b = 11b VW0C7 Voltage monitor 0 reset signal Voltage monitor 0 reset generation circuit VW0C0 to VW0C1, VW0F0 to VW0F1, VW0C6, VW0C7: Bits in VW0C register VCA25: Bit in VCA2 register VW0C0 VW0C6 VW0C1 VW0C1 Digital filter |
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