cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 425

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

Revision 0.8
RTC Register Descriptions
5.15.2.4
I/O Address
Type
Reset Value
5.15.2.5
I/O Address
Type
Reset Value
5.15.2.6
I/O Address
Type
Reset Value
Bit
7:0
Bit
7:0
Bit
7:0
7
7
7
Minutes Alarm (RTC_MINA)
Hours (RTC_HR)
Hours Alarm
Name
MINA_DATA
Name
HR_DATA
Name
HRA_DATA
03h
R/W
00h
04h
R/W
00h
05h
R/W
00h
6
6
6
Description
Minutes Alarm Data. Values may be 00 to 59 in BCD format or 00 to 3B in binary for-
mat. When bits 7 and 6 are both set to one, an unconditional match is selected. Reset
by V
Description
Hours Data. For 12-hour mode, values can be 01 to 12 (AM) and 81 to 92 (PM) in BCD
format, or 01 to 0C (AM) and 81 to 8C (PM) in binary format. For 24-hour mode, values
can be 0 to 23 in BCD format or 00 to 17 in binary format. Reset by V
Description
Hours Alarm Data. For 12-hour mode, values can be 01 to 12 (AM) and 81 to 92 (PM)
in BCD format, or 01 to 0C (AM) and 81 to 8C (PM) in binary format. For 24-hour mode,
values can be 0 to 23 in BCD format or 00 to 17 in binary format. When bits 7 and 6 are
both set to one, unconditional match is selected. Reset by V
5
5
5
PP
(Continued)
power-up.
RTC_MINA Bit Descriptions
RTC_HRA Bit Descriptions
RTC_HR Bit Descriptions
RTC_MINA Register Map
RTC_HRA Register Map
RTC_HR Register Map
4
4
4
MINA_DATA
HRA_DATA
HR_DATA
425
3
3
3
2
2
2
PP
power-up.
1
1
1
PP
power-up.
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