Hour Counter (Rhrcnt); Day Of Week Counter (Rwkcnt) - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
13.3.4

Hour Counter (RHRCNT)

RHRCNT is the counter used for setting/counting the BCD-coded hour value. The count operation is performed by a
carry for each 1 hour of the minute counter.
The assignable range is from 00 through 23 (practically in BCD); otherwise an operation error will occur. Carry out write
processing after stopping the count operation through the setting of the START bit in RCR2.
Bit Bit Name
—
7, 6
5, 4 10 hours
3 to 0 1 hour
13.3.5

Day of Week Counter (RWKCNT)

RWKCNT is the counter used for setting/counting the BCD-coded day-of-week value. The count operation is performed
by a carry for each day of the hour counter.
The assignable range is from 0 through 6 (practically in BCD); otherwise an operation error will occur. Carry out write
processing after stopping the count operation through the setting of the START bit in RCR2.
Bit Bit Name
—
7 to 3
2 to 0 Day
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
BIt: 7 6
- -
Initial value: 0 0
R/W: R R
Initial
Value R/W Description
All 0 R Reserved
These bits are always read as 0. The write value should always be 0.
Undefined R/W Counting Ten's Position of Hours
Counts from 0 to 2 for ten's position of hours.
Undefined R/W Counting One's Position of Hours
Counts from 0 to 9, one number per hour. When a carry is generated, 1 is added
to the ten's position.
BIt: 7 6
- -
Initial value: 0 0
R/W: R R
Initial
Value R/W Description
All 0 R Reserved
These bits are always read as 0. The write value should always be 0.
Undefined R/W Day-of-Week Counting
Day-of-week is indicated with a binary code.
000: Sunday
001: Monday
010: Tuesday
011: Wednesday
100: Thursday
101: Friday
110: Saturday
111: Reserved (setting prohibited)
5 4 3 2 1
10 hours 1 hour
Undefined Undefined Undefined Undefined Undefined Undefined
R/W R/W R/W R/W R/W
5 4 3 2 1
- - - Day
0 0 0
Undefined Undefined Undefined
R R R R/W R/W
13. Realtime Clock
0
R/W
0
R/W
13-6