TL16C752C Datasheet, PDF (43/50 Pages) Texas Instruments – DUAL UART WITH 64-BYTE FIFO

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TL16C752C
DUAL UART
WITH 64-BYTE FIFO
SLLS646 – MARCH 2008
TL16C752C Programmer's Guide
The base set of registers that are used during high-speed data transfer have a straightforward access method.
The extended function registers require special access bits to be decoded along with the address lines. The
following guide will help with programming these registers. Note that the descriptions below are for individual
register access. Some streamlining through interleaving can be obtained when programming all the registers.
Set baud rate to VALUE1,VALUE2
Set Xoff1,Xon1 to VALUE1,VALUE2
Set Xoff2,Xon2 to VALUE1,VALUE2
Set software flow control mode to VALUE
Set flow control threshold to VALUE
Set xmt and rcv FIFO thresholds to VALUE
Read FIFORdy register
Read LCR (03), save in temp
Set LCR (03) to 80
Set DLL (00) to VALUE1
Set DLM (01) to VALUE2
Set LCR (03) to temp
Read LCR (03), save in temp
Set LCR (03) to BF
Set Xoff1 (06) to VALUE1
Set Xon1 (04) to VALUE2
Set LCR (03) to temp
Read LCR (03), save in temp
Set LCR (03) to BF
Set Xoff2 (07) to VALUE1
Set Xon2 (05) to VALUE2
Set LCR (03) to temp
Read LCR (03), save in temp
Set LCR (03) to BF
Set EFR (02) to VALUE
Set LCR (03) to temp
Read LCR (03), save in temp1
Set LCR (03) to BF
Read EFR (02), save in temp2
Set EFR (02) to 10 + temp2
Set LCR (03) to 00
Read MCR (04), save in temp3
Set MCR (04) to 40 + temp3
Set TCR (06) to VALUE
Set LCR (03) to BF
Set EFR (02) to temp2
Set LCR (03) to temp1
Set MCR (04) to temp3
Read LCR (03), save in temp1
Set LCR (03) to BF
Read EFR (02), save in temp2
Set EFR (02) to 10 + temp2
Set LCR (03) to 00
Read MCR (04), save in temp3
Set MCR (04) to 40 + temp3
Set TLR (07) to VALUE
Set LCR (03) to BF
Set EFR (02) to temp2
Set LCR (03) to temp1
Set MCR (04) to temp3
Read MCR (04), save in temp1
Set temp2 = temp1 * EF
Set MCR (04), save in temp2
Read FRR (07), save in temp2
Pass temp2 back to host
Set MCR (04) to temp1
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