rs5c62 RICOH Co.,Ltd., rs5c62 Datasheet - Page 17

• Manufacturer Part Number: rs5c62
• Description: Real-time Clock
• Manufacturer: RICOH Co.,Ltd.

2.8 Leap Year Indication Register (BANK1 at “Bh”)
24-hour time scale 12-hour time scale 12-hour time scale 24-hour time scale
*
*
*
*
*
4) The 12-hour or 24-hour time scale must be selected before time of day adjustment or alarm time setting
1) The bits marked with “
2) The LY1 and LY0 bits cycle from “00” via “01” and “10” to “11” with the passage of years.
3) Upon setting the LYE bit to “0”, automatic correction is made for leap years in the years 1901 to 2099 (e.g. 1992, 1996, and 2000).
4) Writing to the 1-year or 10-year counter enables leap year indication (sets the LYE bit to “0”).
*
D3
0
*
1
Upon setting the LYE bit to “1”, leap year indication is disabled (counting up to February 28).
(e.g. at the time of initialization after power-on from 0V)
00
01
02
03
04
05
06
07
08
09
10
11
LYE
LYE
D2
12 (AM12)
01 (AM 1)
02 (AM 2)
03 (AM 3)
04 (AM 4)
05 (AM 5)
06 (AM 6)
07 (AM 7)
08 (AM 8)
09 (AM 9)
10 (AM10)
11 (AM11)
*
LY
” are not intended for write operation.
D1
*
1
LY
D0
*
0
Leap year indication bits (intended for only read operation) *
Leap year indication selection bit *
Any other value
(For write operation)
(For read operation)
LYE
(LY
12
13
14
15
16
17
18
19
20
21
22
23
0
1
(0,0)
1
,LY
0
)
Enables leap year indication.
Disables leap year indication.
32 (PM12)
21 (PM 1)
22 (PM 2)
23 (PM 3)
24 (PM 4)
25 (PM 5)
26 (PM 6)
27 (PM 7)
28 (PM 8)
29 (PM 9)
30 (PM10)
31 (PM11)
Specifies leap year indication (including February 29) (when
the LYE bit is set to “0”.
Specifies normal year indication (not including February 29).
3,4
Function
Function
RP/RF/RS5C62
2
13