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参数资料
| 型号： | RX-4591CF |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO10 |
| 封装： | SON-10 |
| 文件页数： | 19/19页 |
| 文件大小： | 256K |
| 代理商： | RX-4591CF |
RX - 4591 CF
Page - 6
MQ - 402 - 01
8.2. Register description
8.2.1. Clock and calendar registers (Reg-0 to Reg-6)
Data format
Data is in the BCD format. For example, if the SEC register is set to "0101 1001", this means 59 seconds.
The time measurement is in 24-hour format (fixed).
YEAR register and leap year
The YEAR register becomes year 00 after year 99.
Divide the YEAR register’s 2-digit BCD by four, and if the remainder is 0, then this year is determined as the
leap year. ( Year 00 is processed as a leap year. This calendar expires in year 2099.)
Day of the WEEK register
The day of the WEEK register is made of 7 bits from 0 to 6. The bits are assigned as shown in the following
table.
Be sure not to set multiple days of week to "1".
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Day of the week
0
1
Sunday
0
1
0
Monday
0
1
0
Tuesday
0
1
0
Wednesday
0
1
0
Thursday
0
1
0
Friday
1
0
Saturday
8.2.2. Alarm registers (Reg-8 to Reg-A)
Address
Function
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
8
MIN alarm
AE
40
20
10
8
4
2
1
9
HOUR alarm
AE
20
10
8
4
2
1
6
5
4
3
2
1
0
A
WEEK alarm
DAY alarm
AE
20
10
8
4
2
1
You can set the day of the week, day, hour and minute for alarm. The WADA bit specifies which alarm of the WEEK
alarm or the DAY alarm assign to the register A.
Bit 7 is the AE (Alarm Enable) bit for all the alarm registers. By using this bit, you can easily set the hourly alarm and
the daily alarm. The day of the week alarm can be set to any multiple days of week.
When the AE bit is set to "0", the appropriate register and the clock register are compared; when the AE bit is set to
"1" ("don’t care"), the two registers are not compared because they are considered to have the same value.
When the alarm goes off, the AF (Alarm Flag) bit of Reg-E is set to "1"; if at this moment the AIE (Alarm Interrupt
Enable) bit of Reg-F has been set to "1", the /IRQ pin is set to the low level and the interrupt signal occurs. If the AIE
bit has been set to "0", the alarm interrupt output from the /IRQ pin is prohibited.
If alarm interrupt is not used, then addresses 8 to A can be used as memory registers. In this case, set the AIE bit to
"0" to prohibit usage of the alarm and alarm interrupt.
The relationship between the day of the week alarm bit and each day of the week
bit
bit 6
bit 5
Bit 4
bit 3
bit 2
bit 1
bit 0
Day of the week Saturday
Friday
Thursday Wednesday Tuesday Monday Sunday
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