W83627EHF_0611 Datasheet, PDF (101/144 Pages) Winbond – WINBOND LPC I/O

W83627EHF/EF, W83627EHG/EG
CR 27h. (Reserved)
CR 28h. (Global Option; Default 50h)
BIT READ / WRITE
DESCRIPTION
7 Reserved.
Flash ROM size select
= 00 1M
6~5
R/W
= 01 2M
= 10 4M (Default)
= 11 8M
Select to enable/disable decoding of BIOS ROM range 000E xxxxh.
4
R/W
= 0 Enable decoding of BIOS ROM range at 000E xxxxh.
= 1 Disable decoding of BIOS ROM range at 000E xxxxh.
Select to enable/disable decoding of BIOS ROM range FFFE xxxxh.
3
R/W
= 0 Enable decoding of BIOS ROM range at FFFE xxxxh.
= 1 Disable decoding of BIOS ROM range at FFFE xxxxh.
PRTMODS2 ~ 0 =>
2~0
R/W
= 0xx Parallel Port Mode.
= 1xx Reserved.
CR 29h. (OVT#/HM_SMI#, UART A, Game port & MIDI pin select; Default 04h)
BIT READ / WRITE
DESCRIPTION
7 Reserved.
6
R/W
5~4 ^Reserved.
PIN5 function select
= 0 PIN5 Æ OVT#
= 1 PIN5 Æ HM_SMI#.
PIN49~54,56~57 function select
3
R/W
= 0 PIN49~54,56~57 Æ UART A.
= 1 PIN49~54,56~57 Æ GPIO6.
PIN119~120 function select
2~1
R/W
Bit-2
0
0
1
Bit-1
0
1
x
PIN119~PIN120 function
PIN 119~120 Æ CPUFANIN1, CPUFANOUT1
PIN 119~120 Æ GP21, GP20
PIN 119~120 Æ MSI, MSO (Default)
PIN121~128 function select
0
R/W
= 0 PIN121~128 Æ Game Port.
= 1 PIN121~128 Æ GPIO1.
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Publication Release Date: Nov. 2006
Revision 1.3