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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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PC87309VLJ Datasheet(PDF) 119 Page - National Semiconductor (TI) |
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PC87309VLJ Datasheet(HTML) 119 Page - National Semiconductor (TI) |
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119 / 192 page  Enhanced Serial Port with IR -UART2 (Logical Device 2) 119 www.national.com 5.13.1 Baud Generator Divisor Ports, LSB (BGD(L)) and MSB (BGD(H)) These ports perform the same function as the Legacy Baud Divisor Ports in Bank 1 and are accessed identically, but do not change the operation mode of the module when access- ed. Refer to Section 5.12.1 on page 118 for more details. Use these ports to set the baud when operating in Extended mode to avoid fallback to a Non-Extended operation mode, i.e., 16550 compatible.When programming the baud, writ- ing to BGDH causes the baud to change immediately. 76543210 Reset Required x x x x x x x x Low Byte Port (BGD(L)) Bank 2, Least Significant Byte Baud Generator Divisor of Baud Generator Offset 00h 76543210 Reset Required x x x x x x x x High Byte Port (BGD(H)) Bank 2, Most Significant Byte of Baud Generator Baud Generator Divisor Offset 01h TABLE 5-14. Baud Generator Divisor Settings Prescaler Value 13 1.625 1 Baud Divisor % Error Divisor % Error Divisor % Error 50 2304 0.16% 18461 0.00% 30000 0.00% 75 1536 0.16% 12307 0.01% 20000 0.00% 110 1047 0.19% 8391 0.01% 13636 0.00% 134.5 857 0.10% 6863 0.00% 11150 0.02% 150 768 0.16% 6153 0.01% 10000 0.00% 300 384 0.16% 3076 0.03% 5000 0.00% 600 192 0.16% 1538 0.03% 2500 0.00% 1200 96 0.16% 769 0.03% 1250 0.00% 1800 64 0.16% 512 0.16% 833 0.04% 2000 58 0.53% 461 0.12% 750 0.00% 2400 48 0.16% 384 0.16% 625 0.00% 3600 32 0.16% 256 0.16% 416 0.16% 4800 24 0.16% 192 0.16% 312 0.16% 7200 16 0.16% 128 0.16% 208 0.16% 9600 12 0.16% 96 0.16% 156 0.16% 14400 8 0.16% 64 0.16% 104 0.16% 19200 6 0.16% 48 0.16% 78 0.16% 28800 4 0.16% 32 0.16% 52 0.16% 38400 3 0.16% 24 0.16% 39 0.16% 57600 2 0.16% 16 0.16% 26 0.16% 115200 1 0.16% 8 0.16% 13 0.16% 230400 --- --- 4 0.16% --- --- 460800 --- --- 2 0.16% --- --- 750000 --- --- --- --- 2 0.00% 921600 --- --- 1 0.16% --- --- 1500000 --- --- --- --- 1 0.00% |
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