參數(shù)資料
型號： LV8572A
廠商： National Semiconductor Corporation
英文描述： LV8572A Low Voltage Real Time Clock (RTC)
中文描述： LV8572A低電壓實時時鐘（RTC）
文件頁數(shù)： 16/20頁
文件大小： 329K
代理商： LV8572A
Control and Status Register Address Bit Map
D7
D6
D5
D4
D3
D2
D1
D0
1. Reset by
writing
1 to bit.
Main Status Register
PS
e
X
R/W
RS
e
X
R/W
ADDRESS
e
00H
R/W
R/W
R/W
1
R/W
1
R
2
R
3
Page
Select
Register
Select
RAM
RAM
Alarm
Interrupt
Periodic
Interrupt
Power Fail
Interrupt
Interrupt
Status
2. Set/reset by
voltage at
PFAIL pin.
3. Reset when
all pending
interrupts
are removed.
Periodic Flag Register
PS
e
0
R/W
RS
e
0
Address
e
03H
4. Read Osc fail
Write 0 Batt-
Backed Mode
Write 1 Single
Supply Mode
R/W
4
R
5
R
5
R
5
R
5
R
5
R
5
Test
Mode
Osc. Fail/
Single Supply
1 ms
Flag
10 ms
Flag
100 ms
Flag
Seconds
Flag
10 Second
Flag
Minute
Flag
5. Reset by
positive edge
of read.
Time Save Control Register
PS
e
0
R/W
RS
e
0
Address
e
04H
R/W
R
6
R/W
R/W
R/W
R/W
R/W
Time Save
Enable
Low Battery
Flag
Power Fail
Delay
Enable
6. Set and reset
by V
BB
voltage.
RAM
RAM
RAM
RAM
RAM
Real Time Mode Register
PS
e
0
RS
e
1
Address
e
01H
Crystal
Freq. XT1
Crystal
Freq. XT0
RAM
Interrupt EN
on Back-Up
Clock
Start/Stop
12/24 Hr.
Mode
Leap Year
MSB
Leap Year
LSB
All Bits R/W
Output Mode Register
PS
e
0
RS
e
1
Address
e
02H
MFO as
Crystal
RAM
RAM
RAM
RAM
RAM
RAM
RAM
All Bits R/W
Interrupt Control Register 0
PS
e
0
RS
e
1
Address
e
03H
1 ms
Interrupt
Enable
10 ms
Interrupt
Enable
100 ms
Interrupt
Enable
Seconds
Interrupt
Enable
10 Second
Interrupt
Enable
Minute
Interrupt
Enable
RAM
RAM
All Bits R/W
Interrupt Control Register 1
PS
e
0
RS
e
1
Address
e
04H
Power Fail
Interrupt
Enable
Alarm
Interrupt
Enable
DOW
Interrupt
Enable
Month
Interrupt
Enable
DOM
Interrupt
Enable
Hours
Interrupt
Enable
Minute
Interrupt
Enable
Second
Interrupt
Enable
All Bits R/W
16
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LV8572AM 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LV8572A Low Voltage Real Time Clock (RTC)
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