參數(shù)資料
型號: UPD4990AC-A
元件分類: 時鐘/數(shù)據(jù)恢復及定時提取
英文描述: 0 TIMER(S), REAL TIME CLOCK, PDIP14
封裝: DIP-14
文件頁數(shù): 20/51頁
文件大小: 211K
代理商: UPD4990AC-A
22
CHAPTER 3 ACCESS SEQUENCE
(1) Parallel Command Mode
Fig. 3-5 Write Data Timing-chart (Using C2, C1, C0)
Note: td1 = 1
s MAX.
(2) Serial Command Mode
Fig. 3-6 Write Data Timing-chart (Using C3,’ C2’, C1’, C0’)
Note: td1 = 1
s MAX.
CLK
STB
1
2
3
4
5
36
37
38
39
40
DATA IN
D2
D1
D0
D3
D0
D3
D2
D1
D3
D0
C2
REGISTER SHIFT
Command
(001)
REGISTER HOLD
Command
(000)
TIME SET
Command
(010)
C1
C0
Internal
Mode
TIME SET
REGISTER HOLD
td1
Count start
REGISTER SHIFT
Units
of
Second
Month
CLK
STB
C0
C1
C2
47
48
Internal
Mode
td1
Units
of
Second
REGISTER SHIFT
Command
(0, 0, 0, 1)
DATA IN
D0
D2
D1
D3
D1
D2
D3
12
34
46
Tens
of
Year
TIME SET
td1
TIME SET
Command
(0, 0, 1, 0)
REGISTER HOLD
Command
(0, 0, 0, 0)
Count start
REGISTER SHIFT
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