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R5F2135CANFP Datasheet(PDF) 71 Page - Renesas Technology Corp |
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R5F2135CANFP Datasheet(HTML) 71 Page - Renesas Technology Corp |
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71 / 766 page  R8C/35A Group 6. Voltage Detection Circuit REJ09B0407-0010 Rev.0.10 Jan 16, 2008 Page 40 of 728 Under development Preliminary specification Specifications in this manual are tentative and subject to change Figure 6.2 Block Diagram of Voltage Monitor 0 Reset Generation Circuit Figure 6.3 Block Diagram of Voltage Monitor 1 Interrupt Generation Circuit + - 1/2 1/2 1/2 Voltage detection 0 circuit VCA25 VCC Internal reference voltage When VCA25 bit is set to 0 (disabled), voltage detection 0 signal is driven high. Voltage detection 0 signal fOCO-S VW0F1 to VW0F0 = 00b = 01b = 10b = 11b VW0C0 Voltage monitor 0 reset generation circuit VW0C0, VW0C1, VW0F0, VW0F1: Bits in VW0C register VCA25: Bit in VCA2 register VDSEL0, VDSEL1: Bits in OFS register VW0C1 Voltage monitor 0 reset signal Digital filter VW0C1 Level selection VDSEL1 to VDSEL0 + - 1/2 1/2 1/2 Voltage detection 1 circuit VCA26 VW1C3 When VCA26 bit is set to 0 (disabled), voltage detection 1 signal is driven high. Voltage detection 1 signal fOCO-S VW1F1 to VW1F0 = 00b = 01b = 10b = 11b VW1C2 bit is set to 0 (not detected) by writing 0 by a program. When VCA26 bit is set to 0 (voltage detection 1 circuit disabled), VW1C2 bit is set to 0. VW1C2 IRQ1SEL Maskable interrupt signal Voltage monitor 1 interrupt generation circuit VW1C0 to VW1C3, VW1F0, VW1F1, VW1C6, VW1C7: Bits in VW1C register VCA21, VCA22, VCA26: Bits in VCA2 register VD1S0 to VD1S3: Bits in VD1LS register COMPSEL, IRQ1SEL: Bits in CMPA register VCA1C: Bit in VCAC register COMPSEL VD1S3 to VD1S0 VCA22 = 0 VCC VW1C1 = 0 VW1C1 = 1 Digital filter Edge selection circuit VW1C0 VCA1C VW1C7 VCA21 = 0 Internal reference voltage Level selection Non-maskable interrupt signal Voltage monitor 1 interrupt signal Watchdog timer interrupt signal Comparator A1 interrupt signal |
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