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SH7721 Datasheet(PDF) 1072 Page - Renesas Technology Corp |
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SH7721 Datasheet(HTML) 1072 Page - Renesas Technology Corp |
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1072 / 1524 page  Section 30 SIM Card Module (SIM) Rev. 3.00 Jan. 18, 2008 Page 1010 of 1458 REJ09B0033-0300 For the inverse-convention type, the logical level 1 is assigned to the A state, and the logical level 0 to the Z state, and transmission and reception are performed in MSB-first. The data of the start character shown in figure 30.3 is then H'3F. Even parity is used according to the smart card specification, and so the parity bit is 0 corresponding to the Z state. In addition, the only D7 to D0 bits are inverted by the SINV bit. The O/ E bit in SCSMR is set to odd parity mode to invert the parity bit. In transmission and reception, the setting condition is similar. Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp Ds D7 D6 D5 D4 D3 D2 D1 D0 Dp A ZZ A ZZ A AZ Z A ZZ A AA A AZ A (Z) (Z) (Z) (Z) state state (a) Direct convention (SDIR=SINV=O/ E=0) (b) Inverse convention (SDIR=SINV=O/ E=1) Figure 30.3 Examples of Start Character Waveforms |
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