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)： 16/32頁
文件大?。?/td> 133K
代理商： UPD4991A
μ
PD4991A
16
Table 5 Address Correspondence Table 2
ALARM SET & TP
1
CONTROL MODE (MODE = 0, *, 0, 1)
ALARM SET & TP
2
CONTROL MODE (MODE = 0, *, 1, 0)
ADDRESS
MSB
FUNCTION
LSB
0
0
0
0
1-second digit
R/W
0
0
0
1
10-second digit
R/W
0
0
1
0
1-minute digit
R/W
0
0
1
1
10-minute digit
R/W
0
1
0
0
1-hour digit
R/W
0
1
0
1
10-hour digit
R/W
0
1
1
0
Date digit
R/W
0
1
1
1
1-day digit
R/W
1
0
0
0
10-day digit
R/W
1
0
0
1
1-month digit
R/W
1
0
1
0
10-month digit
R/W
1
0
1
1
TP
1
/TP
2
FUNCTION CONTROL
*1
W/O
1
1
0
0
Leap year/12.24 HOUR SELECT
*2
R/W
1
1
0
1
CONTROL REGISTER1
W/O
1
1
1
0
CONTROL REGISTER2
R/W
1
1
1
1
MODE REGISTER
W/O
*: Don’t Care. This bit is ignored.
R/W : READ AND WRITE
W/O : WRITE ONLY
*1.
TP
1
FUNCTION CONTROL is performed in MODE (0, *, 0, 1).
TP
2
FUNCTION CONTROL is performed in MODE (0, *, 1, 0).
*2.
The leap year counter is in MODE (0, *, 0, 1).
The 12/24 HOUR SELECT is in MODE (0, *, 1, 0).
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