CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 446

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

6.15.2.12 RTC Control Register B (RTC_CRB)
I/O Address
Type
Reset Value
446
SET_MODE
Bit
7
6
5
4
3
2
1
0
7
Name
SET_MODE
PI_EN
AI_EN
UEI_EN
RSVD
DATA_MODE
HR_MODE
DAY_SAVE
PI_EN
0Bh
R/W
00h
6
31506B
Description
Set Mode. This bit is reset at V
0: Timing updates occur normally
1: User copy of time is “frozen”, allowing the time registers to be accessed whether or
Periodic Interrupts Enable. Bits [3:0] of RTC_CRA (PIR_SEL
which this interrupt is generated. It is cleared to 0 on an RTC reset (i.e., hardware
reset) or when the RTC is disable.
0: Disable.
1: Enable.
Alarm Interrupt Enable. This interrupt is generated immediately after a time update in
which the seconds, minutes, hours, date and month time equal their respective alarm
counterparts. It is cleared to 0 as long as bit 7 of RTC_CRD (VRT bit) reads 0.
0: Disable.
1: Enable.
Update Ended Interrupts Enable. This interrupt is generated when an update occurs.
It is cleared to 0 on an RTC reset (i.e., hardware reset) or when the RTC is disabled.
0: Disable.
1: Enable.
Reserved. This bit is defined as “Square Wave Enable” by the MC146818 and is not
supported by the RTC. This bit is always read as 0.
Data Mode. Selects data mode. This bit is reset at V
0: BCD format.
1: Binary format.
Hour Mode. Selects hour mode. This bit is reset at V
0: 12-hour format.
1: 24-hour format.
Daylight Saving. Enables/disables daylight savings mode. This bit is reset at V
power-up reset only.
0: Disable.
1: Enable.
In the spring, time advances from 1:59:59 AM to 3:00:00 AM on the first Sunday in
April.
In the fall, time returns from 1:59:59 AM to 1:00:00 AM on the last Sunday in October.
AI_EN
not an update occurs.
5
RTC_CRB Bit Descriptions
RTC_CRB Register Map
UEI_EN
4
PP
RSVD
3
power-up reset only.
AMD Geode™ CS5535 Companion Device Data Book
DATA_MODE
2
Real-Time Clock Register Descriptions
PP
PP
power-up reset only.
power-up reset only.
HR_MODE
)
determine the rate at
1
DAY_SAVE
PP
0