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R5F3640MNFB Datasheet(PDF) 67 Page - Renesas Technology Corp |
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R5F3640MNFB Datasheet(HTML) 67 Page - Renesas Technology Corp |
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67 / 398 page  REJ09B0392-0064 Rev.0.64 Oct 12, 2007 Page 46 of 373 Under development Preliminary Specification Specification in this preliminary version is subject to change. M16C/64 Group 6. Voltage Detection Circuit Figure 6.10 RSTFR Register b7 0 0 b6 b5 b4 b1 b2 b3 Reset Source Determine Flag Symbol RSTFR Address 0018h Bit Symbol Bit Name RW CWR After Reset 0XXXXXXXb (1) RW b0 Function Cold start-up / warm start determine flag (2, 3) — (b5-b1) RO RW Read as undefined value Reserved bits Set to 0 Reserved bits — (b7-b6) 1. The CWR bit is set to 0 (cold start-up) after power activation or brown-out reset. The CWR bit remains unchanged after hardware reset 1, software reset, watchdog timer reset, or oscillation stop detection reset. 2. The CWR bit is set to 1 by writing a 1 in a program (writing a 0 has no effect). 3. The CWR bit is undefined when the VW0C0 bit in the VW0C register is set to 0 (brown-out reset disabled). 0 : Cold start-up 1 : Warm start-up NOTES : |
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