Ver 1.3
PRELIMINARY
EAGLE
3.26
Real Time Clock
RTC operates on a separate power supply, RTC is powered by it’s own battery instead of the system power. When system
is powered up, RTC registers are controlled through APB bus. All bus signals are masked when system is powered off.
The year, month, day, hour, minute and second is displayed in BCD format with an initial value of 2004/01/01 – 00:00:00.
3.26.1 RTC Control Register (RTCCON)
Address : FFE0 A800h
Bit
31 : 8
7
R/W
R
R/W
Description
Default Value
Reserved.
RTC Test Simulation Mode
-
0b
0 : Normal (use 1 Hz clock generated internally)
1 : Use 16384 Hz clock for fast simulation.
Reserved.
RTC Interrupt period
00x : No Interrupt
6 : 4
3 : 0
R
R/W
-
0h
010 : per 1 sec.
011 : per 10 sec.
100 : per 1 min.
101 : per 10 min.
110 : per 1 hour
111 : per 1 day
3.26.2 SEC Register (RTCSEC)
Address : FFE0 A804h
Bit
31 : 7
6 : 4
R/W
R
R/W
R/W
Description
Default Value
Reserved
-
0h
0h
BCD value for second from 0 to 5
BCD value for second from 0 to 9
3 : 0
3.26.3 MIN Register (RTCMIN)
Address : FFE0 A808h
Bit
31 : 7
6 : 4
R/W
R
R/W
R/W
Description
Default Value
Reserved
-
0h
0h
BCD value for minute from 0 to 5
BCD value for minute from 0 to 9
3 : 0
3.26.4 HOUR Register (RTCHOUR)
Address : FFE0 A80Ch
Bit
31 : 6
5 : 4
R/W
R
R/W
R/W
Description
Default Value
Reserved
BCD value for hour from 0 to 2
BCD value for hour from 0 to 9
-
0h
0h
3 : 0
191
CONFIDENTIAL
Beijing Peak Microtech Co.Ltd.
ETC [ ETC ]
