SC16C752B datasheet(31/47 Pages) PHILIPS

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Philips Semiconductors

SC16C752B

5 V, 3.3 V and 2.5 V dual UART, 5 Mbit/s (max.), with 64-byte FIFOs

Product data

Rev. 03 — 14 December 2004

31 of 47

9397 750 14443

Programmer’s guide

The base set of registers that is 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

programming all the registers.

Table 23:

Command

Actions

Set baud rate to VALUE1, VALUE2

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

Set Xoff-1, Xon-1 to VALUE1, VALUE2

Read LCR (03), save in temp

Set LCR (03) to BF

Set Xoff-1 (06) to VALUE1

SET Xon-1 (04) to VALUE2

Set LCR (03) to temp

Set Xoff-2, Xon-2 to VALUE1, VALUE2

Read LCR (03), save in temp

Set LCR (03) to BF

Set Xoff-2 (07) to VALUE1

SET Xon-2 (05) to VALUE2

Set LCR (03) to temp

Set software ﬂow control mode to

VALUE

Read LCR (03), save in temp

Set LCR (03) to BF

Set EFR (02) to VALUE

Set LCR (03) to temp

Set ﬂow control threshold to VALUE

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 MCR (04) to temp3

Set LCR (03) to BF

Set EFR (02) to temp2

Set LCR (03) to temp1

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