Intel C2550 FH8065401488912 Data Sheet
Product codes
FH8065401488912
Intel
®
Atom™ Processor C2000 Product Family for Microserver
September 2014
Datasheet, Vol. 2 of 3
Order Number: 330061-002US
537
Volume 2—8254 Programmable Interval Timer (PIT)—C2000 Product Family
Register Map
27.6.1
I/O Mapped Registers
The I/O ports listed in
have multiple register functions depending on the
current programmed state of the 8254. The port numbers referenced in the register
descriptions following
is one combination but not the only one.
Table 27-4. Register Aliases
Port
Alias
Register Name
Default Value
Access
40h
50h
0xxxxxxxb
RO
Undefined
RW
41h
51h
0xxxxxxxb
RO
Undefined
RW
42h
52h
0xxxxxxxb
RO
Undefined
RW
43h
53h
Undefined
WO
Read Back Command (RBC)
xxxxxxx0b
WO
Counter Latch Command (CLC)
xxxx0000b
WO