Time And Date Registers - Micro crystal RV-1805-C3 Applications Manual

Micro Crystal
Extrem Low Power Real Time Clock / Calendar Module
3.2.

TIME AND DATE REGISTERS

00h - Hundredths
This register holds the count of hundredths of seconds, in two binary coded decimal (BCD) digits. Values will be
from 00 to 99. Note that in order to divide from 32.768 kHz, the hundredths register will not be fully accurate at all
times but will be correct every 500 ms. Maximum jitter of this register will be less than 1 ms. The Hundredths
Counter is not valid if the RC Oscillator is selected.
Address Function
Hundredths
00h
Reset
Bit Symbol
7:0 Hundredths
01h - Seconds
This register holds the count of seconds, in two binary coded decimal (BCD) digits. Values will be from 00 to 59.
Address Function
Seconds
01h
Reset
Bit Symbol
7 GP0
6:0 Seconds
02h – Minutes
This register holds the count of minutes, in two binary coded decimal (BCD) digits. Values will be from 00 to 59.
Address Function
Minutes
02h
Reset
Bit Symbol
7 GP1
6:0 Minutes
Bit 7 Bit 6 Bit 5
80 40 20
1 0 0
Value
00 to 99 Holds the count of hundredths of seconds, coded in BCD format.
Bit 7 Bit 6 Bit 5
GP0 40 20
0 0 0
Value
0 or 1 Register bit for general purpose use.
00 to 59 Holds the count of seconds, coded in BCD format.
Bit 7 Bit 6 Bit 5
GP1 40 20
0 0 0
Value
0 or 1 Register bit for general purpose use.
00 to 59 Holds the count of minutes, coded in BCD format.
Bit 4 Bit 3 Bit 2
10 8 4
1 1 0
Description
Bit 4 Bit 3 Bit 2
10 8 4
0 0 0
Description
Bit 4 Bit 3 Bit 2
10 8 4
0 0 0
Description
RV-1805-C3
Bit 1 Bit 0
2 1
0 1
Bit 1 Bit 0
2 1
0 0
Bit 1 Bit 0
2 1
0 0
14/98