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參數(shù)資料
| 型號： | UPD4991A |
| 廠商： | NEC Corp. |
| 英文描述： | 4-BIT PARALLEL I/O CALENDAR CLOCK |
| 中文描述： | 4位并行I / O日歷鐘 |
| 文件頁數(shù)： | 15/32頁 |
| 文件大小： | 133K |
| 代理商： | UPD4991A |
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μ
PD4991A
15
2.
ALARM SET & TP
1
CONTROL MODE (MODE = 0 * 0 1)
ALARM SET & TP
2
CONTROL MODE (MODE = 0 * 1 0)
(1) Setting time to alarm register
The alarm register consists of a total of 44 bits with 4 bits each of 10-month digit, 1-month digit, 10-day digit,
1-day digit, date digit, 10-hour digit, 1-hour digit, 10-minute digit, 1-minute digit, 10-second digit, and 1-
second digit.
Manipulating alarm register
When “F
H
” is set to a certain digit of the alarm register, the digit is regarded as indicating an alarm
coincidence, which occurs when the value of the alarm register coincides with the contents of the time
counter, regardless of the data of the time counter.
If “F
H
” is set to all the digits, alarm coincidence occurs regardless of the data of the time counter. The
addresses corresponding to the respective digits are shown in Table 5 Address Correspondence Table
2.
Tables 6 and 7 Data Correspondence Tables 3 and 4 show the function control of TP
1
/TP
2
.
Example: An alarm coincidence occurs for 1 second at 54 minutes 32 seconds of every hour.
Digit
10-month 1-month
10-day
1-day
Date
10-hour
1-hour
10-minute
1-minute
10-second
1-second
Code
F
H
F
H
F
H
F
H
F
H
F
H
F
H
5
H
4
H
3
H
2
H
Example: An alarm coincidence occurs at 10 to 19 minites of every hour.
Digit
10-month 1-month
10-day
1-day
Date
10-hour
1-hour
10-minute
1-minute
10-second
1-second
Code
F
H
F
H
F
H
F
H
F
H
F
H
F
H
1
H
F
H
F
H
F
H
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