- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376428 > UPD4991A (NEC Corp.) 4-BIT PARALLEL I/O CALENDAR CLOCK PDF資料下載
參數(shù)資料
| 型號(hào)： | 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)： | 19/32頁 |
| 文件大?。?/td> | 133K |
| 代理商： | UPD4991A |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁當(dāng)前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
μ
PD4991A
19
Table 9 Data Correspondence Table 6
Leap year counter
(MODE = 0, *, 0, 1, ADDRESS = 1, 1, 0, 0)
D3
D2
D1
D0
R/W
*
*
Leap year counter (leap year = 0, 0)
*: Don’t Care
Example
10-year
digit
1-year
digit
Leap year
counter
0 0 1 0
0 1 0 1
* * * *
Write 3 to 10-year digit
0 0 1 1
0 1 0 1
* * 1 1
Write 6 to 1-year digit
0 0 1 1
0 1 1 0
Incremented
(Year 36 is a leap year
→
leap year counter = 00H)
(Year 46 is not a leap year
→
leap year counter .
* * 0 0
Write 4 to 10-year digit
0 1 0 0
0 1 1 0
* * 1 0
Write **00B to the leap year counter
0 1 0 0
0 1 1 0
* * 0 0
3.
TIMING PULSE
TP1
The signal output from the TP
1
pin is the alarm coincidence signal. The output waveform is selected from 2048
Hz, 1024 Hz, 64 Hz, 16 Hz, 1 Hz, 1-pulse output, and “H”
→
“L”, depending on the contents set to the TP
1
CONTROL REGISTER.
1-puse output
One pulse is output when the value of the alarm register coincides with the contents of the time counter.
Fig. 1 1-Pulse Output Waveform
.
Alarm coincidence
30.5 s
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UPD4991ACX | 4-BIT PARALLEL I/O CALENDAR CLOCK |
| UPD6125ACA | 4-BIT SINGLE CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION |
| UPD6126A | 4-BIT SINGLE CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION |
| UPD6126AG | 4-BIT SINGLE CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION |
| UPD6125A | 4-BIT SINGLE CHIP MICROCONTROLLER FOR REMOTE CONTROL TRANSMISSION |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD4991ACX-A | 制造商:Renesas Electronics Corporation 功能描述: |
| UPD4992CX-A | 制造商:Renesas Electronics 功能描述:Cut Tape |
| UPD50256CP15 | 制造商:HIT 功能描述:50256 HITACHI'86 SMT N9F8A |
| UPD50256CP-15 | 制造商:HIT 功能描述:50256 HITACHI'86 SMT N9F8A |
| UPD50HC-033 | 制造商:SII 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。