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H8S/2214 数据表(PDF) 537 Page - Renesas Technology Corp |
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H8S/2214 数据表(HTML) 537 Page - Renesas Technology Corp |
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537 / 936 page ![]() Section 12 Serial Communication Interface (SCI) Rev.4.00 Sep. 18, 2008 Page 477 of 872 REJ09B0189-0400 The BRR setting is found from the following formulas. Mode ABCS Bit Rate Error 0 B = 64 × 22n-1 × (N + 1) φ × 106 Error (%) = – 1 × 100 B × 64 × 22n-1 × (N + 1) φ × 106 Asynchronous mode 1 B = 32 × 22n-1 × (N + 1) φ × 106 Error (%) = – 1 × 100 B × 32 × 22n-1 × (N + 1) φ × 106 Clocked synchronous mode X B = 8 × 22n-1 × (N + 1) φ × 106 ⎯ Legend: B: Bit rate (bit/s) N: BRR setting for baud rate generator (0 ≤ N ≤ 255) φ: Operating frequency (MHz) n: Baud rate generator input clock (n = 0 to 3) (See the table below for the relation between n and the clock.) X: Don’t care SMR Setting n Clock CKS1 CKS0 0 φ 0 0 1 φ/4 0 1 2 φ/16 1 0 3 φ/64 1 1 |
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