W83627DHG Nuvoton Technology Corporation of America, W83627DHG Datasheet - Page 38

• Manufacturer Part Number: W83627DHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627DHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.1.3
To exit the Extended Function Mode, writing 0xAA to the EFER is required. Once the chip exits the
Extended Function Mode, it is in the normal running mode and is ready to enter the configuration mode.
6.1.4
The following example is written in Intel 8086 assembly language. It assumes that the EFER is located
at 2Eh, so the EFIR is located at 2Eh and the EFDR is located at 2Fh. If the HEFRAS (CR26 bit 6) is
set, 2Eh can be directly replaced by 4Eh and 2Fh replaced by 4Fh.
;-----------------------------------------------------
; Enter the Extended Function Mode
;-----------------------------------------------------
MOV DX, 2EH
MOV
OUT DX, AL
OUT DX, AL
;-----------------------------------------------------------------------------
; Configure Logical Device 1, Configuration Register CRF0
;-----------------------------------------------------------------------------
MOV DX, 2EH
MOV AL, 07H
OUT DX, AL
MOV DX, 2FH
MOV AL, 01H
OUT DX, AL
;
MOV DX, 2EH
MOV AL, F0H
OUT DX, AL
MOV DX, 2FH
MOV
OUT DX, AL
;----------------------------------------------------------------------------
; Exit the Extended Function Mode
;----------------------------------------------------------------------------
MOV DX, 2EH
MOV
OUT DX, AL
Exit the Extended Function Mode
Software Programming Example
AL, 87H
AL, 3CH
AL, AAH
; point to Logical Device Number Reg.
; select Logical Device 1
; select CRF0
; update CRF0 with value 3CH
-26-
Publication Release Date: Aug, 22, 2007
W83627DHG
Version 1.4