NS16C2552_17 Datasheet, PDF (34/53 Pages) Texas Instruments – Dual Independent UART

NS16C2552, NS16C2752
SNLS238D – AUGUST 2006 – REVISED APRIL 2013
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Figure 18. Crystal Oscillator Circuit
It should be noted that the parasitic capacitance also include printed circuit board traces. The circuit board traces
connecting to the crystal should be kept as short as possible.
CONFIGURATION EXAMPLES
Set Baud Rate
Set divisor values to DIV_L and DIV_M.
• LCR 0x03.7 = 1
• DLL 0x00.7:0 = DIV_L
• DLM 0x01.7:0 = DIV_M
• LCR 0x03.7 = 0
Configure Prescaler Output
Set prescaler output to XIN divide by 4.
• Save LCR 0x03.7:0 in temp
• LCR 0x03.7:0 = 0xBF
• EFR 0x02.4 = 1
• LCR 0x03.7:0 = 0
• MCR 0x04.7 = 1
• LCR 0x03.7:0 = 0xBF
• EFR 0x02.4 = 0 (optional)
• LCR 0x03.7:0 = temp
Set prescaler output to XIN divide by 1.
• Save LCR 0x03.7:0 in temp
• LCR 0x03.7:0 = 0xBF
• EFR 0x02.4 = 1
• LCR 0x03.7:0 = 0
• MCR 0x04.7 = 0
• LCR 0x03.7:0 = 0xBF
• EFR 0x02.4 = 0 (optional)
• LCR 0x03.7:0 = temp
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