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參數(shù)資料
| 型號： | PCF8583 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | XO, clock |
| 英文描述： | Clock/calendar with 240×8-bit RAM(帶240×8位RAM的時(shí)鐘/日歷) |
| 中文描述： | REAL TIME CLOCK |
| 文件頁數(shù)： | 12/28頁 |
| 文件大?。?/td> | 162K |
| 代理商： | PCF8583 |
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1997 Jul 15
12
Philips Semiconductors
Product specification
Clock/calendar with 240
×
8-bit RAM
PCF8583
Fig.10 Alarm control register, event-counter mode.
handbook, full pagewidth
memory location 08
reset state: 0000 0000
timer function :
000 no timer
001 units
010 100
011 10 000
100 1 000 000
101 not allowed
110 not allowed
111 test mode, all counters
in parallel
timer interrupt enable :
0 timer flag, no interrupt
1 timer flag, interrupt
clock alarm function :
00 no event alarm
01 event alarm
10 not allowed
11 not allowed
timer alarm enable :
0 no timer alarm
1 timer alarm
alarm interrupt enable :
0 alarm flag, no interrupt
1 alarm flag, interrupt
7
6
5
4
3
2
1
0
MSB
LSB
MRB007
In the clock mode, if the alarm enable is not activated
(alarm enable bit of control/status register is logic 0), the
interrupt output toggles at 1 Hz with a 50% duty cycle (may
be used for calibration). This is the default power-on state
of the device. The OFF voltage of the interrupt output may
exceed the supply voltage, up to a maximum of 6.0 V.
A logic diagram of the interrupt output is shown in Fig.11.
7.10
Oscillator and divider
A 32.768 kHz quartz crystal has to be connected to OSCI
(pin 1) and OSCO (pin 2). A trimmer capacitor between
OSCI and V
DD
is used for tuning the oscillator (see quartz
frequency adjustment). A 100 Hz clock signal is derived
from the quartz oscillator for the clock counters.
In the 50 Hz clock mode or event-counter mode the
oscillator is disabled and the oscillator input is switched to
a high impedance state.
This allows the user to feed the 50 Hz reference frequency
or an external high speed event signal into the input OSCI.
7.11
Initialization
When power-up occurs the I
2
C-bus interface, the
control/status register and all clock counters are reset.
The device starts time-keeping in the 32.768 kHz clock
mode with the 24 h format on the first of January at
0.00.00: 00. A 1 Hz square wave with 50% duty cycle
appears at the interrupt output pin (starts HIGH).
It is recommended to set the stop counting flag of the
control/status register before loading the actual time into
the counters. Loading of illegal states may lead to a
temporary clock malfunction.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCF8583BS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Clock and calendar with 240 x 8-bit RAM |
| PCF8583BS,518 | 功能描述:實(shí)時(shí)時(shí)鐘 CLOCK CALENDAR W RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| PCF8583BS-T | 功能描述:實(shí)時(shí)時(shí)鐘 CLOCK CALENDAR W 256X8SRAM I2C RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| PCF8583P | 制造商:NXP Semiconductors 功能描述:Clock/Calendar/Alarm/Timer/Interrupt Serial (2-Wire, I2C) 制造商:NXP Semiconductors 功能描述:IC CLOCK CALENDAR/SRAM 8583 DIP8 制造商:NXP Semiconductors 功能描述:IC, CLOCK CALENDAR/SRAM, 8583, DIP8 制造商:NXP Semiconductors 功能描述:Clock/calendar with 2408-bit RAM |
| PCF8583P/F5 | 制造商:NXP Semiconductors 功能描述:Real Time Clock Serial 240Byte 8-Pin PDIP Tube |
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