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SC28L92 数据表(PDF) 26 Page - NXP Semiconductors |
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SC28L92 数据表(HTML) 26 Page - NXP Semiconductors |
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26 / 44 page  Philips Semiconductors Product specification SC28L92 3.3V–5.0V Dual Universal Asynchronous Receiver/Transmitter (DUART) 2000 Jan 21 26 CSR CLOCK SELECT REGISTER Addr CSR (7:4) CSR (3:0) CSRA/B RECEIVER CLOCK SELECT TRANSMITTER CLOCK SELECT 0x01 0x09 See Text and table 5 See Text and table 5 Table 5. Baud rate (base on a 3.6864MHz crystal clock) MR0[0] = 0 (Normal Mode) MR0[0] = 1 (Extended Mode I) MR0[2] = 1 (Extended Mode II) CSRA[7:4] ACR[7] = 0 ACR[7] = 1 ACR[7] = 0 ACR[7] = 1 ACR[7] = 0 ACR[7] = 1 0000 50 75 300 450 4,800 7,200 0001 110 110 110 110 880 880 0010 134.5 134.5 134.5 134.5 1,076 1,076 0011 200 150 1200 900 19.2K 14.4K 0100 300 300 1800 1800 28.8K 28.8K 0101 600 600 3600 3600 57.6K 57.6K 0110 1,200 1,200 7200 7,200 115.2K 115.2K 0111 1,050 2,000 1,050 2,000 1,050 2,000 1000 2,400 2,400 14.4K 14.4K 57.6K 57.6K 1001 4,800 4,800 28.8K 28.8K 4,800 4,800 1010 7,200 1,800 7,200 1,800 57.6K 14.4K 1011 9,600 9,600 57.6K 57.6K 9,600 9,600 1100 38.4K 19.2K 230.4K 115.2K 38.4K 19.2K 1101 Timer Timer Timer Timer Timer Timer 1110 IP4–16X IP4–16X IP4–16X IP4–16X IP4–16X IP4–16X 1111 IP4–1X IP4–1X IP4–1X IP4–1X IP4–1X IP4–1X NOTE: The receiver clock is always a 16X clock except for CSRA[7:4] = 1111. CSRA[3:0]—Channel A Transmitter Clock Select This field selects the baud rate clock for the Channel A transmitter. The field definition is as shown in Table 5, except as follows: CSRA[3:0] 1110 1111 IP3–16X IP3–1X The transmitter clock is always a 16X clock except for CSR[3:0] = 1111. CSRB—Channel B Clock Select Register CSRB[7:4]—Channel B Receiver Clock Select This field selects the baud rate clock for the Channel B receiver. The field definition is as shown in Table 5, except as follows: CSRB[7:4] 1110 1111 IP6–1X IP6–16X The receiver clock is always a 16X clock except for CSRB[7:4] = 1111. CSRB[3:0]—Channel B Transmitter Clock Select This field selects the baud rate clock for the Channel B transmitter. The field definition is as shown in Table 5, except as follows: CSRB[3:0] 1110 1111 IP5–1X IP5–16X The transmitter clock is always a 16X clock except for CSRB[3:0] = 1111. |
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