參數(shù)資料
型號: W83697UF
英文描述: W83697F plus 2 Extra UART (total 4 UART)
中文描述: W83697F加2額外的UART(共4 UART)的
文件頁數(shù): 26/78頁
文件大?。?/td> 475K
代理商: W83697UF
W83697UF
Publication Release Date: Dec.2002
- 22 - Revision 1.0
2.3.4 Software programming example
The following example is written in Intel 8086 assembly language. It assumes that the EFER is located
at 2Eh, so EFIR is located at 2Eh and EFDR is located at 2Fh. If HEFRAS (CR26 bit 6) is set, 4Eh
can be directly replaced by 4Eh and 2Fh replaced by 4Fh.
;-----------------------------------------------------------------------------------
; Enter the extended function mode ,interruptible double-write |
;-----------------------------------------------------------------------------------
MOV
DX,2EH
MOV AL,87H
OUT
DX,AL
OUT
DX,AL
;-----------------------------------------------------------------------------
; Configurate logical device 1, configuration register CRF0 |
;-----------------------------------------------------------------------------
MOV
DX,2EH
MOV
AL,07H
OUT
DX,AL
; point to Logical Device Number Reg.
MOV
DX,2FH
MOV
AL,01H
OUT
DX,AL
; select logical device 1
;
MOV
DX,2EH
MOV
AL,F0H
OUT
DX,AL
; select CRF0
MOV
DX,2FH
MOV AL,3CH
OUT
DX,AL
; update CRF0 with value 3CH
;------------------------------------------
; Exit extended function mode |
;------------------------------------------
MOV
DX,2EH
MOV AL,AAH
OUT
DX,AL
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