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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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SH7708 데이터시트(PDF) 427 Page - Renesas Technology Corp |
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SH7708 데이터시트(HTML) 427 Page - Renesas Technology Corp |
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427 / 633 page  409 Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp A (Z) Z Z A Z Z Z A A Z (Z) State a. Direct convention (SDIR, SINV, and O/ E are all 0) Ds D7 D6 D5 D4 D3 D2 D1 D0 Dp A (Z) Z Z A A A A A A Z (Z) State b. Inverse convention (SDIR, SINV, and O/ E are all 1) Figure 14.4 Waveform of Start Character 14.3.5 Clock Only the internal clock generated by the on-chip baud rate generator can be used as the communication clock in the smart card interface. The bit rate for the clock is set by the bit rate register (SCBRR) and the CKS1 and CKS0 bits in the serial mode register (SCSMR), and is calculated using the equation below. Table 14.5 shows sample bit rates. If clock output is then selected by setting CKE0 to 1, a clock with a frequency 372 times the bit rate is output from the SCK0 pin. B = × 106 1488 × 22n–1 × (N + 1) φ P Where: N = Value set in SCBRR (0 ≤ N ≤ 255) B = Bit rate (bit/s) P φ = Peripheral module operating frequency (MHz)* n = 0–3 (table 14.4) |
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