CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 447

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CS5535-UDCF

Manufacturer Part Number
CS5535-UDCF
Description
Manufacturer
AMD (ADVANCED MICRO DEVICES)
Datasheet

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

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Real-Time Clock Register Descriptions
6.15.2.13 RTC Control Register C (RTC_CRC)
I/O Address
Type
Reset Value
AMD Geode™ CS5535 Companion Device Data Book
Bit
3:0
7
6
5
4
IRQF
7
Name
IRQF (RO)
PF (RO)
AF (RO)
UF (RO)
RSVD (RO)
PF
0Ch
RO
00h
6
Description
IRQ Flag (Read Only). This RO bit mirrors the value on the interrupt output signal.
When interrupt is active, IRQF is 1. Reading this register clears this bit (and deactivates
the interrupt pin) and clears the flag bits UF, AF, and PF.
0: IRQ inactive.
1: Logic equation is true: ((UIE and UF) or (AIE and AF) or (PIE and PF)).
Periodic Interrupts Flag (Read Only). This RO bit is cleared to 0 on an RTC reset
(i.e., hardware reset) or when the RTC is disabled. In addition, this bit is cleared to 0
when this register is read.
0: No transition occurred on the selected tap since the last read.
1: Transition occurred on the selected tap of the divider chain.
Alarm Interrupt Flag (Read Only). This RO bit is cleared to 0 as long as bit 7 of
RTC_CRD (VRT bit) is 0. In addition, this bit is cleared to 0 when this register is read.
0: No alarm detected since the last read.
1: Alarm condition detected.
Update Ended Interrupts Flag (Read Only). This RO bit is cleared to 0 on an RTC
reset (i.e., hardware reset) or when the RTC is disabled. In addition, this bit is cleared
to 0 when this register is read.
0: No update occurred since the last read.
1: Time registers updated.
Reserved (Read Only). Reads as 0.
AF
5
RTC_CRC Bit Descriptions
RTC_CRC Register Map
UF
4
3
2
RSVD
31506B
1
0
447

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