FW82801DBM S L6DN Intel, FW82801DBM S L6DN Datasheet - Page 320
FW82801DBM S L6DN
Manufacturer Part Number
FW82801DBM S L6DN
Description
Manufacturer
Intel
Datasheet
1.FW82801DBM_S_L6DN.pdf
(615 pages)
Specifications of FW82801DBM S L6DN
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LPC Interface Bridge Registers (D31:F0)
9.1.25
9.1.26
320
RTC_CONF—RTC Configuration Register (LPC I/F—D31:F0)
Offset Address:
Default Value:
Lockable:
COM_DEC—LPC I/F Communication Port Decode Ranges
(LPC I/F—D31:F0)
Offset Address:
Default Value:
Lockable:
7:5
1:0
Bit
Bit
6:4
2:0
4
3
2
7
3
Reserved
Upper 128-byte Lock (U128LOCK) — R/W-Special.
0 = Access to these bytes in the upper CMOS RAM range have not been locked.
1 = Locks reads and writes to bytes 38h–3Fh in the upper 128-byte bank of the RTC CMOS RAM.
Lower 128-byte Lock (L128LOCK) — R/W-Special.
0 = Access to these bytes in the lower CMOS RAM range have not been locked.
1 = Locks reads and writes to bytes 38h–3Fh in the lower 128-byte bank of the RTC CMOS RAM.
Upper 128-byte Enable (U128E) — R/W.
0 = Disable.
1 = Enables access to the upper 128-byte bank of RTC CMOS RAM.
Reserved
Reserved
COMB Decode Range — R/W. This field determines which range to decode for the COMB Port.
000 = 3F8h
001 = F8h
010 = 220h
011 = 228h
100 = 238h
101 = 2E8h
110 = 338h
111 = 3E8h
Reserved
COMA Decode Range — R/W. This field determines which range to decode for the COMA Port.
000 = 3F8h
001 = 2F8h
010 = 220h
011 = 228h
100 = 238h
101 = 2E8h
110 = 338h
111 = 3E8h
Write cycles to this range will have no effect and read cycles will not return any particular
guaranteed value. This is a write once register that can only be reset by a hardware reset.
Write cycles to this range will have no effect and read cycles will not return any particular
guaranteed value. This is a write once register that can only be reset by a hardware reset.
–
Yes
D8h
00h
E0h
00h
No
–
–
–
–
–
–
–
–
–
–
–
–
–
2FFh (COM2)
–
–
22Fh
33Fh
22Fh
33Fh
3EFh (COM3)
3EFh (COM3)
3FFh (COM1)
227h
23Fh
3FFh (COM1)
2FFh (COM2)
227h
23Fh
2EFh (COM4)
2EFh (COM4)
Description
Description
Attribute:
Size:
Power Well:
Attribute:
Size:
Power Well:
Intel
®
82801DBM ICH4-M Datasheet
R/W, R/W-Special
8 bit
Core
R/W
8 bit
Core
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