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參數(shù)資料
| 型號(hào)： | PCF8563 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Real-time clock/calendar(實(shí)時(shí)時(shí)鐘/日歷) |
| 中文描述： | 實(shí)時(shí)時(shí)鐘/日歷（實(shí)時(shí)時(shí)鐘/日歷） |
| 文件頁數(shù)： | 11/30頁 |
| 文件大小： | 676K |
| 代理商： | PCF8563 |
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Philips Semiconductors
PCF8563
Real-time clock/calendar
Product specification
16 April 1999
11 of 30
9397 750 04855
Philips Electronics N.V. 1999. All rights reserved.
8.6.6
CLKOUT frequency register
8.6.7
Countdown timer registers
The Timer register is an 8-bit binary countdown timer. It is enabled and disabled via
the Timer control register bit TE. The source clock for the timer is also selected by the
Timer control register. Other timer properties, e.g. interrupt generation, are controlled
via the Control/status 2 register. For accurate read back of the countdown value, the
I
2
C-bus clock SCL must be operating at a frequency of at least twice the selected
timer clock.
Table 23: CLKOUT frequency register bits description (address 0DH)
Bit
Symbol
Description
7
FE
FE = 0; the CLKOUT output is inhibited and the CLKOUT output is
set to high-impedance. FE = 1; the CLKOUT output is activated.
6 to 2
not implemented
1
FD1
These bits control the frequency output (f
CLKOUT
) on the CLKOUT
pin; see
Table 24
.
0
FD0
Table 24: CLKOUT frequency selection
FD1
0
0
1
1
FD0
0
1
0
1
f
CLKOUT
32.768 kHz
1024 Hz
32 Hz
1 Hz
Table 25: Timer control register bits description (address 0EH)
Bit
Symbol
Description
7
TE
TE = 0; timer is disabled. TE = 1; timer is enabled.
6 to 2
not implemented
1
TD1
Timer source clock frequency selection bits. These bits determine
the source clock for the countdown timer, see
Table 26
. When not
in use, TD1 and TD0 should be set to ‘11’ (
1
60
Hz) for power
saving.
0
TD0
Table 26: Timer source clock frequency selection
TD1
0
0
1
1
TD0
0
1
0
1
Timer source clock frequency (Hz)
4096
64
1
1
60
Table 27: Timer countdown value register bits description (address 0FH)
Bit
Symbol
7 to 0
<timer countdown value>
Description
This register holds the loaded countdown value ‘n’.
Countdown period
n
Source clock frequency
---------------------------------------------------------
=
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| PCF8566 | Universal LCD driver for low multiplex rates |
| PCF8573 | Clock/calendar with Power Fail Detector |
| PCF8573P | Clock/calendar with Power Fail Detector |
| PCF8573T | Clock/calendar with Power Fail Detector |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCF8563_11 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Real-time clock/calendar |
| PCF8563BS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Real-time clock/calendar |
| PCF8563BS/4 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Real-time clock/calendar |
| PCF8563BS/4,118 | 功能描述:實(shí)時(shí)時(shí)鐘 ULTRA LOW POWER 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(chǔ)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 |
| PCF8563BS/4-T | 功能描述:實(shí)時(shí)時(shí)鐘 ULTRA LOW POWER CLOCK CALENDAR 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(chǔ)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 |
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