Winbond W83627DHG, Manual

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W83627DHG
Publication Release Date: Aug, 22, 2007
-183- Version 1.4
CR 27h. (Reserved)
CR 28h. (Global Option; Default 50h)
BIT READ / WRITE DESCRIPTION
7 Reserved.
6~5
R / W
Flash ROM size select
= 00 1M
= 01 2M
= 10 4M (Default)
= 11 8M
4 R / W
Select to enable/disable decoding of BIOS ROM range 000E xxxxh.
= 0 Enable decoding of BIOS ROM range at 000E xxxxh.
= 1 Disable decoding of BIOS ROM range at 000E xxxxh.
3 R / W
Select to enable/disable decoding of BIOS ROM range FFE xxxxx.
= 0 Enable decoding of BIOS ROM range at FFE xxxxx.
= 1 Disable decoding of BIOS ROM range at FFE xxxxx.
2~0 R / W
PRTMODS2 ~ 0 =>
= 0xx
Parallel Port Mode.
= 1xx Reserved.
CR 29h. (Multi-function Pin Selection; Default 00h)
BIT READ / WRITE DESCRIPTION
7 Reserved.
6
R / W
Pin 5 function select
= 0 OVT#
= 1 SMI#
5~4
Reserved.
3 R / W
Pins 49 ~ 54, 56 ~ 57 function select
= 0 Pins 49 ~ 54, 56 ~ 57
Æ UART A
= 1 Pins 49 ~ 54, 56 ~ 57 Æ GPIO6
2~1 R / W
Pin 119 ~ 120 function select
Bit-2 Bit-1 Pin 119 ~ 120 function
0 0
Pin 119 ~ 120 Æ CPUFANIN1, CPUFANOUT1
(Default)
0 1 Pin 119 ~ 120 Æ GP21, GP20
0 Reserved.