RA4803SA
Page - 8
ETM38E-03
8.2. Details of Registers
It explains each register based on Bank2.
8.2.1. Clock counter ( 1/100S, SEC - HOUR )
Address
Function
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
0
1/100 S
80
40
20
10
8
4
2
1
1
SEC
40
20
10
8
4
2
1
2
MIN
40
20
10
8
4
2
1
3
HOUR
20
10
8
4
2
1
∗
)
"o" indicates write-protected bits. A zero is always read from these bits.
•
The clock counter counts 1/100s, seconds, minutes, and hours.
•
The data format is BCD format
.
For example, when the "seconds" register value is "0101 1001" it indicates 59
seconds.
∗
Note with caution that writing non-existent time data may interfere with normal operation of the clock counter.
1) 1/100 Second counter
Address
Function
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
0
1/100 S
80
40
20
10
8
4
2
1
•
This second counter counts from "00" to "01," "02," and up to 99/100 seconds, after which it starts again
from 00 seconds.
2) Second counter
Address
Function
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
1
SEC
40
20
10
8
4
2
1
•
This second counter counts from "00" to "01," "02," and up to 59 seconds, after which it starts again
from 00 seconds.
3) Minute counter
Address
Function
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
2
MIN
40
20
10
8
4
2
1
•
This minute counter counts from "00" to "01," "02," and up to 59 minutes, after which it starts again from
00 minutes.
4) Hour counter
Address
Function
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
3
HOUR
20
10
8
4
2
1
•
This hour counter counts from "00" hours to "01," "02," and up to 23 hours, after which it starts again
from 00 hours.
