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PRELIMINARY
S3C6400
RISC MICROPROCESSOR
Real Time Clock
33-7
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
RTC ALARM CONTROL(RTCALM) REGISTER
The RTCALM register determines the alarm enable and the alarm time. Note that the RTCALM register
generates the alarm signal through both ALMINT and PMWKUP in power down mode, but only through ALMINT
in the normal operation mode.
Register
Address
R/W
Description
Reset Value
RTCALM 0x7E005050 R/W RTC
alarm control Register
0x0
RTCALM
Bit
Description
Initial State
Reserved [7]
0
ALMEN [6]
Alarm
global
enable
0 = Disable, 1 = Enable
0
YEAREN
[5]
Year alarm enable
0 = Disable, 1 = Enable
0
MONEN [4]
Month
alarm
enable
0 = Disable, 1 = Enable
0
DATEEN
[3]
Date alarm enable
0 = Disable, 1 = Enable
0
HOUREN
[2]
Hour alarm enable
0 = Disable, 1 = Enable
0
MINEN [1]
Minute
alarm
enable
0 = Disable, 1 = Enable
0
SECEN
[0]
Second alarm enable
0 = Disable, 1 = Enable
0
ALARM SECOND DATA (ALMSEC) REGISTER
Register
Address
R/W
Description
Reset Value
ALMSEC
0x7E005054
R/W
Alarm second data Register
0x0
ALMSEC
Bit
Description
Initial State
Reserved [7]
0
[6:4]
BCD value for alarm second.
0 ~ 5
000
SECDATA
[3:0]
0 ~ 9
0000
ALARM MIN DATA(ALMMIN) REGISTER
Register
Address
R/W
Description
Reset Value
ALMMIN 0x7E005058
R/W Alarm
minute data Register
0x00
ALMMIN
Bit
Description
Initial State
Reserved [7]
0
[6:4]
BCD value for alarm minute.
0 ~ 5
000
MINDATA
[3:0]
0 ~ 9
0000