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MC68HC705MC4MP Datasheet(PDF) 136 Page - Freescale Semiconductor, Inc |
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MC68HC705MC4MP Datasheet(HTML) 136 Page - Freescale Semiconductor, Inc |
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136 / 180 page ![]() Serial Communications Interface MC68HC705MC4 — Rev. 2.0 Serial Communications Interface SCR2–SCR0 — SCI Baud Rate Select Bits These read/write bits select the SCI baud rate, as shown in Table 11-2. Reset has no effect on the SCR2–SCR0 bits. Table 11-3 shows all possible SCI baud rates derived from crystal frequencies of 2 MHz, 4 MHz, 4.194304 MHz, and 6 MHz. Table 11-1. Baud Rate Generator Clock Prescaling SCP[1:0] Baud Rate Generator Clock 00 Internal Clock ÷ 1 01 Internal Clock ÷ 3 10 Internal Clock ÷ 4 11 Internal Clock ÷ 13 Table 11-2. Baud Rate Selection SCR[2:1:0] SCI Baud Rate (Baud) 000 Prescaled Clock ÷ 1 001 Prescaled Clock ÷ 2 010 Prescaled Clock ÷ 4 011 Prescaled Clock ÷ 8 100 Prescaled Clock ÷ 16 101 Prescaled Clock ÷ 32 110 Prescaled Clock ÷ 64 111 Prescaled Clock ÷ 128 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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