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87LPC762 Datasheet(PDF) 37 Page - NXP Semiconductors |
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87LPC762 Datasheet(HTML) 37 Page - NXP Semiconductors |
37 / 57 page Philips Semiconductors Preliminary data 87LPC762 Low power, low price, low pin count (20 pin) microcontroller with 2 kbyte OTP 2001 Oct 26 34 Table 10. Baud Rates, Timer Values, and CPU Clock Frequencies for SMOD1 = 1 Timer Co nt Baud Rate Timer Count 2400 4800 9600 19.2 k 38.4 k 57.6 k 115.2 k –1 0.2304 0.4608 0.9216 * 1.8432 * 3.6864 5.5296 * 11.0592 –2 0.4608 0.9216 * 1.8432 * 3.6864 * 7.3728 * 11.0592 – –3 0.6912 1.3824 2.7648 5.5296 * 11.0592 16.5888 – –4 0.9216 * 1.8432 * 3.6864 * 7.3728 * 14.7456 – – –5 1.1520 2.3040 4.6080 9.2160 * 18.4320 – – –6 1.3824 2.7648 5.5296 * 11.0592 – – – –7 1.6128 3.2256 6.4512 12.9024 – – – –8 * 1.8432 * 3.6864 * 7.3728 * 14.7456 – – – –9 2.0736 4.1472 8.2944 16.5888 – – – –10 2.3040 4.6080 9.2160 * 18.4320 – – – –11 2.5344 5.0688 10.1376 – – – – –12 2.7648 5.5296 * 11.0592 – – – – –13 2.9952 5.9904 11.9808 – – – – –14 3.2256 6.4512 12.9024 – – – – –15 3.4560 6.9120 13.8240 – – – – –16 * 3.6864 * 7.3728 * 14.7456 – – – – –17 3.9168 7.8336 15.6672 – – – – –18 4.1472 8.2944 16.5888 – – – – –19 4.3776 8.7552 17.5104 – – – – –20 4.6080 9.2160 * 18.4320 – – – – –21 4.8384 9.6768 19.3536 – – – – NOTES TO TABLES 9 AND 10: 1. Tables 9 and 10 apply to UART modes 1 and 3 (variable rate modes), and show CPU clock rates in MHz for standard baud rates from 2400 to 115.2k baud. 2. Table 9 shows timer settings and CPU clock rates with the SMOD1 bit in the PCON register = 0 (the default after reset), while Table 10 reflects the SMOD1 bit = 1. 3. The tables show all potential CPU clock frequencies up to 20 MHz that may be used for baud rates from 9600 baud to 115.2 k baud. Other CPU clock frequencies that would give only lower baud rates are not shown. 4. Table entries marked with an asterisk (*) indicate standard crystal and ceramic resonator frequencies that may be obtained from many sources without special ordering. |
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