NHE6300ESB S L7XJ Intel, NHE6300ESB S L7XJ Datasheet - Page 376

• Manufacturer Part Number: NHE6300ESB S L7XJ
• Manufacturer: Intel

Specifications of NHE6300ESB S L7XJ

• Lead Free Status / RoHS Status: Compliant

Table 260. RTC I/O Registers
8.6.2
Table 261. RTC (Standard) RAM Bank
Intel
DS
376
®
6300ESB I/O Controller Hub
Indexed Registers
The RTC contains two sets of indexed registers that are accessed using the two
separate Index and Target registers (70/71h or 72/73h), as shown in
NOTES:
70h and 74h
71h and 75h
72h and 76h
73h and 77h
1. I/O locations 70h and 71h are the standard ISA location for the real-time clock. The map for
2. Software must preserve the value of bit 7 at I/O addresses 70h and 74h. When writing to
Locations
this bank is shown in
The extended RAM bank is also accessed using an indexed scheme. I/O address 72h is used
as the address pointer and I/O address 73h is used as the data register. Index addresses
above 127h are not valid. When the extended RAM is not needed, it may be disabled.
these addresses, software must first read the value, and then write the same value for bit 7
during the sequential address write.
0Eh - 7Fh
I/O
Index
0Dh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
Also alias to 72h and 76h
Also alias to 73h and 77h
When U128E bit = 0
Seconds
Seconds Alarm
Minutes
Minutes Alarm
Hours
Hours Alarm
Day of Week
Day of Month
Month
Year
Register A
Register B
Register C
Register D
114 Bytes of User RAM
Table
Name
261. Locations 72h and 73h are for accessing the extended RAM.
Real-Time Clock (Standard RAM) Index Register
NOTE: Writes to 72h, 74h and 76h do not affect the
Real-Time Clock (Standard RAM) Target Register
Extended RAM Index Register (when enabled)
Extended RAM Target Register (when enabled)
NMI enable (bit 7 of 70h)
Function
Order Number: 300641-004US
Intel
Table
®
6300ESB ICH—8
November 2007
261.