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HD64F36022 Datasheet(PDF) 196 Page - Renesas Technology Corp |
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HD64F36022 Datasheet(HTML) 196 Page - Renesas Technology Corp |
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196 / 384 page  Section 12 Watchdog Timer Rev. 4.00 Sep. 23, 2005 Page 170 of 354 REJ09B0025-0400 12.2.3 Timer Mode Register WD (TMWD) TMWD selects the input clock. Bit Bit Name Initial Value R/W Description 7 to 4 All 1 Reserved These bits are always read as 1. 3 2 1 0 CKS3 CKS2 CKS1 CKS0 1 1 1 1 R/W R/W R/W R/W Clock Select 3 to 0 Select the clock to be input to TCWD. 1000: Internal clock: counts on φ/64 1001: Internal clock: counts on φ/128 1010: Internal clock: counts on φ/256 1011: Internal clock: counts on φ/512 1100: Internal clock: counts on φ/1024 1101: Internal clock: counts on φ/2048 1110: Internal clock: counts on φ/4096 1111: Internal clock: counts on φ8192 0XXX: Internal oscillator For the internal oscillator overflow periods, see section 18, Electrical Characteristics. Legend X: Don't care. |
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