R×5C348A/B
2.3 Time Counters (at Addresses 0h to 2h)
· Time digit display (BCD format) as follows:
The second digits range from 00 to 59 and are carried to the minute digit in transition from 59 to 00.
The minute digits range from 00 to 59 and are carried to the hour digits in transition from 59 to 00.
The hour digits range as shown in “2.1-2 12/24: 12-/ 24-hour Mode Selection Bit” and are carried to the
day-of-month and day-of-week digits in transition from PM11 to AM12 or from 23 to 00.
· Any writing to the second counter resets divider units of less than 1 second.
· Any carry from lower digits with the writing of non-existent time may cause the time counters to malfunction.
Therefore, such incorrect writing should be replaced with the writing of existent time data.
2.3-1 Second Counter (at Address 0h)
D7
—
D6
S40
D5
S20
D4
S10
D3
S8
D2
S4
D1
S2
D0
S1
(For writing)
(For reading)
Default settings*
0
0
S40
S20
S10
S8
S4
S2
S1
Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite
2.3-2 Minute Counter (at Address 1h)
D7
—
D6
D5
D4
D3
M8
D2
M4
D1
M2
D0
M1
(For writing)
M40
M20
M10
(For reading)
Default settings*
0
0
M40
M20
M10
M8
M4
M2
M1
Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite
2.3-3 Hour Counter (at Address 2h)
D7
—
D6
—
D5
D4
D3
H8
D2
H4
D1
H2
D0
H1
(For writing)
P/A or H20
H10
(For reading)
Default settings*
0
0
0
0
P/A or H20
H10
H8
H4
H2
H1
Indefinite Indefinite Indefinite Indefinite Indefinite Indefinite
)
Default settings: Default value means read/written values when the XSTP bit is set to “1” due to power-on from 0 volts or supply voltage drop.
*
17
RICOH [ RICOH ELECTRONICS DEVICES DIVISION ]
