RV-4162 Datasheet, PDF (11/39 Pages) MICORO CRYSTAL SWITZERLAND – Ultra Small Real Time Clock

Micro Crystal
Ultra Small Real Time Clock / Calendar Module
RV-4162
3.4. CLOCK SECTION
10^th / 100^th Second (address 00h…bits description)
Address
00h
Function
10^th / 100^th of seconds¹⁾
Bit 7
8
Bit 6
4
Bit 5
2
Bit 4
1
Bit 3
8
Bit 2
4
Bit 1
2
Bit 0
1
Bit
7 to 4
3 to 0
Symbol
10^th of second
100^th of second
Value
0 to 9
0 to 9
Description
This register hold the current 10^th of second coded in BCD format
This register hold the current 100^th of second coded in BCD format
1) _{Generation of 100}th _{and 10}th _{of second is derived from the internal clock source 32.768 kHz divided by 328 = 0.010009766 second. A WRITE}
to any register of the Clock Section 00h to 07h will reset the divider chain of the 32.768 kHz clock and set the 10^th / 100^th of second = “00”.
Values other than “00” cannot be written to this register.
Seconds (address 01h…bits description)
Address
Function
Bit 7
01h
Seconds
OS
Bit 6
40
Bit 5
20
Bit 4
10
Bit 3
8
Bit 2
4
Bit 1
2
Bit
7
6 to 0
Symbol
OS
Seconds
Value
0
1
0 to 59
Description
32.768 kHz oscillator is enabled and starts within Tstart  1 sec.
32.768 kHz oscillator is disabled (stopped)
This register holds the current seconds coded in BCD format
Bit 0
1
Minutes (address 02h…bits description)
Address
Function
02h
Minutes
Bit 7
OFIE
Bit 6
40
Bit 5
20
Bit 4
10
Bit 3
8
Bit 2
4
Bit 1
2
Bit 0
1
Bit
7
6 to 0
Symbol
OFIE
Minutes
Value
0
1
0 to 59
Description
Oscillator fail interrupt is disabled
Oscillator fail interrupt is enabled; an interrupt will be issued when an
oscillator failure is detected
This register holds the current minutes coded in BCD format
Hours (address 03h…bits description)
Address
Function
03h
Hours
Bit
7 to 6
5 to 0
Symbol
X
Hours
Bit 7
0
Bit 6
0
Bit 5
20
Bit 4
10
Bit 3
8
Bit 2
4
Bit 1
2
Value
0
0 to 23
Description
Unused; must be set to “0”
This register holds the current hours coded in BCD format
Bit 0
1
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