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參數(shù)資料
| 型號： | CDP1879 |
| 廠商： | Intersil Corporation |
| 英文描述： | CMOS Real-Time Clock(CMOS 實時時鐘) |
| 中文描述： | CMOS實時時鐘（的CMOS實時時鐘） |
| 文件頁數(shù)： | 3/18頁 |
| 文件大?。?/td> | 100K |
| 代理商： | CDP1879 |
4-106
RESET
V
DD
AM - PM
AND
HOUR LOGIC
PRESCALE
OSCILLATOR
SECOND
XTAL
XTAL
MINUTE
HOUR
DAY
MONTH
FREEZE
CIRCUIT
CALENDAR
LOGIC
PRESCALE
SELECT
CLOCK
SELECT
CONTROL
REGISTER
INT. STATUS
REGISTER
CLOCK AND
INT. LOGIC
CLOCK OUT
INT
V
SS
I/O
INTERFACE
SECOND
LATCH
MINUTE
LATCH
HOUR
LATCH
COMPARATOR
DB0-DB7
A0
A1
A2
TPA
I-O MEM
TPB/WR
RD
CS
POWER DOWN
ADDRESS DECODE
AND
CONTROL LOGIC
8-BIT DATA BUS
FIGURE 1. REAL-TIME CLOCK FUNCTIONAL DIAGRAM
TABLE 1.
CONTROL REGISTER BIT ASSIGNMENT
Bit 1, 0
Frequency 00
Select 01
10
11
32768Hz
1.048576MHz
2.097152MHz
4.194304MHz
Bit 2
Start/Stop
1 = Start
0 = Stop
Bit 3
Counter/Latch Control
“0” = Write to Counter and disable alarm
“1” = Write to and enable alarm Clock Select
Bit 7, 6, 5, 4
0000 - disable
μ
s
0001 - 488.2
μ
s
0010 - 976.5
μ
s
0011 - 1953.1
μ
s
0100 - 3906.2
μ
s
0101 - 7812.5
μ
s
0110 - 15.625ms
0111 - 31.25ms
1000 - 62.5ms
1001 - 125ms
1010 - 250ms
1011 - 500ms
1100 - sec.
1101 - min.
1110 - hour
1111 - day
TABLE 2.
ADDRESSES
A2
A1
A0
Latch, Counter Seconds
0
1
0
Latch, Counter Minutes
0
1
1
Latch, Counter Hours
1
0
0
Counter, Day
1
0
1
Counter, Month
1
1
0
Control, Register
1
1
1
Status Register
1
1
1
MSB of Hours Counters (Bit 7) is an AM-PM Bit. 0 = AM; 1 = PM
Bit 6 of Hours Counter Controls 12/24 hr. 1 = 12 Hr: 0 = 24 Hr.
Status Register: Bit 7 MSB = Alarm
Interrupt Source: Bit 6 = Clock.
MSB of Month Counter (Bit 7) is a Leap Year Bit 0 = No, 1 = Yes.
CDP1879, CDP1879C-1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CDP1879E | CMOS Real-Time Clock |
| CDP1879CE1 | CMOS Real-Time Clock |
| CDP1881CE | CMOS 6-Bit Latch and Decoder Memory Interfaces |
| CDP1881C | CMOS 6-Bit Latch and Decoder Memory Interfaces(CMOS ６位鎖存和解碼存儲器接口) |
| CDP1882 | CMOS 6-Bit Latch and Decoder Memory Interfaces(CMOS ６位鎖存和解碼存儲器接口) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CDP1879C-1 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Real-Time Clock |
| CDP1879C1D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| CDP1879C1E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC |
| CDP1879CD1 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Real-Time Clock |
| CDP1879CD1X | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS Real-Time Clock |
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