S3C44B0X

Manufacturer Part NumberS3C44B0X
DescriptionBGA
ManufacturerSamsung
S3C44B0X datasheets
 

Specifications of S3C44B0X

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S3C2400 RISC MICROPROCESSOR
REAL TIME CLOCK SPECIAL REGISTERS
REAL TIME CLOCK CONTROL REGISTER (RTCCON)
The RTCCON register consists of 4 bits such as the RTCEN, which controls the read/write enable of the BCD
registers, CLKSEL, CNTSEL, and CLKRST for testing.
RTCEN bit can control all interfaces between the CPU and the RTC, so it should be set to 1 in an RTC control
routine to enable data read/write after a system reset. Also before power off, the RTCEN bit should be cleared to 0 to
prevent inadvertent writing into RTC registers.
Register
Address
RTCCON
0x15700040(L)
0x15700043(B)
RTCCON
Bit
RTCEN
[0]
CLKSEL
[1]
CNTSEL
[2]
CLKRST
[3]
NOTES:
1.
All RTC registers have to be accessed by byte unit using STRB and LDRB instructions or char type pointer.
2.
(L): When the endian mode is little endian.
(B): When the endian mode is Big endian.
TICK TIME COUNT REGISTER (TICNT)
Register
Address
TICNT
0x15700044(L)
0x15700047(B)
TICNT
Bit
TICK INT ENABLE
[7]
TICK TIME COUNT
[6:0]
R/W
R/W
RTC control Register
(by byte)
Description
RTC control enable
0 = Disable
1 = Enable
NOTE: Only BCD time count and read operation can be performed.
BCD clock select
15
0 = XTAL 1/2
divided clock
1 = Reserved (XTAL clock only for test)
BCD count select
0 = Merge BCD counters
1 = Reserved (Separate BCD counters)
RTC clock count reset
0 = No reset,
1 = Reset
R/W
R/W
Tick time count Register
(by byte)
Description
Tick time interrupt enable
0 = disable
1 = enable
Tick time count value. (1–127)
This counter value decreases internally, and users can not read
this real counter value in working.
REAL TIME CLOCK
Description
Reset Value
Initial State
Description
Reset Value
0x00000000
Initial State
0x0
0
0
0
0
0
000000
17-4