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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M32C/8A датащи(PDF) 58 Page - Renesas Technology Corp |
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M32C/8A датащи(HTML) 58 Page - Renesas Technology Corp |
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58 / 372 page  M32C/8A Group 6. Power Supply Voltage Detection Function Rev.1.00 Jul 15, 2007 Page 41 of 352 REJ09B0385-0100 6.1 Vdet3 Detection Function The hardware reset 2 is performed if the voltage applied to the VCC1 pin drops to Vdet3 (V) or below. Set the VC26 bit in the VCR2 register to 1 to use this Vdet3 detection function. When the hardware reset 2 occurs, ports and I/O pins for peripheral functions are reset. The CPU and SFRs are reset when td(S-R) elapses after the voltage applied to the VCC1 pin reaches Vdet3r (V) or above. Then, the MCU executes a program in an address indicated by the reset vector. The states of pins and SFRs after reset are the same as the hardware reset 1. Use the Vdet3 detection function while operating at or above Vdet3s. If the applied voltage drops below Vdet3s, perform the hardware reset 1 (refer to 5.1.1 Reset at a Stable Supply Voltage). The Vdet3 detection function cannot be used while the MCU is in stop mode. Figure 6.5 shows a Vdet3 detection function operation example. Figure 6.5 Vdet3 Detection Function Operation Example VSS VCC1 RESET Set to 1 (Vdet3 detection function used) by program. NOTES: 1. Typical value. 2. Minimum value. 5.0 V 5.0 V Vdet3r Vdet3 Vdet3s 2.0V(2) Undefined VC26 bit in the VCR2 register Internal reset signal 3.0 V(1) 3.1 V(1) “H” “L” “1” “0” “H” “L” Wait time to release hardware reset 2: td(S-R) |
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