參數(shù)資料
型號(hào): 935270056512
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: 4 CHANNEL(S), 5M bps, SERIAL COMM CONTROLLER, PQCC68
封裝: PLASTIC, MS-018, SOT-188-2, LCC-68
文件頁(yè)數(shù): 26/52頁(yè)
文件大小: 680K
代理商: 935270056512
Philips Semiconductors
SC16C754
Quad UART with 64-byte FIFO
Product data
Rev. 02 — 14 March 2003
32 of 49
9397 750 11192
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
8.
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
register access. Some streamlining through interleaving can be obtained when
programming all the registers.
Table 23:
Register programming guide
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 ow 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 ow 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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