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ZUSBOPTSC01ZAC 数据表(PDF) 164 Page - Zilog, Inc. |
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ZUSBOPTSC01ZAC 数据表(HTML) 164 Page - Zilog, Inc. |
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164 / 402 page ![]() LIN-UART P R E L I M I N A R Y PS024604-1005 Z8 Encore!® Motor Control Flash MCUs Product Specification 142 The baud rate error relative to the appropriate baud rate is calculated using the following equation: For reliable communication, the LIN-UART baud rate error must never exceed 5 percent. Tables 78 through 82 provide error data for popular baud rates and commonly-used crystal oscillator frequencies for normal UART modes of operation. Table 78. LIN-UART Baud Rates, 20.0 MHz System Clock Applicable Rate (kHz) BRG Divisor (Decimal) Actual Rate (kHz) Error( %) Applicable Rate (kHz) BRG Divisor (Decimal) Actual Rate (kHz) Error( %) 1250.0 1 1250.0 0.00 9.60 130 9.62 0.16 625.0 2 625.0 0.00 4.80 260 4.81 0.16 250.0 5 250.0 0.00 2.40 521 2.399 –0.03 115.2 11 113.64 –1.19 1.20 1042 1.199 –0.03 57.6 22 56.82 –1.36 0.60 2083 0.60 0.02 38.4 33 37.88 –1.36 0.30 4167 0.299 –0.01 19.2 65 19.23 0.16 Table 79. LIN-UART Baud Rates, 10.0MHz System Clock Applicable Rate (kHz) BRG Divisor (Decimal) Actual Rate (kHz) Error( %) Applicable Rate (kHz) BRG Divisor (Decimal) Actual Rate (kHz) Error( %) 1250.0 N/A N/A N/A 9.60 65 9.62 0.16 625.0 1 625.0 0.00 4.80 130 4.81 0.16 250.0 3 208.33 –16.67 2.40 260 2.40 –0.03 115.2 5 125.0 8.51 1.20 521 1.20 –0.03 57.6 11 56.8 –1.36 0.60 1042 0.60 –0.03 38.4 16 39.1 1.73 0.30 2083 0.30 0.2 19.2 33 18.9 0.16 UART Baud Rate Error (%) 100 Actual Data Rate Desired Data Rate – Desired Data Rate ---------------------------------------------------------------------------------------------------- × = |
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