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参数资料
| 型号： | PCF8563TD-T |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | XO, clock |
| 英文描述： | Real-time clock/calendar |
| 中文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封装： | 3.90 MM, PLASTIC, SO-8 |
| 文件页数： | 3/32页 |
| 文件大小： | 711K |
| 代理商： | PCF8563TD-T |
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Philips Semiconductors
PCF8563
Real-time clock/calendar
Product specication
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
I2C-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.
6to2
not implemented
1
FD1
These bits control the frequency output (fCLKOUT) on the CLKOUT
pin; see Table 24.
0
FD0
Table 24: CLKOUT frequency selection
FD1
FD0
fCLKOUT
0
32.768 kHz
0
1
1 024 Hz
1
0
32 Hz
11
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.
6to2
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
TD0
Timer source clock frequency (Hz)
0
4096
01
64
10
1
11
1
60
Table 27: Timer countdown value register bits description (address 0FH)
Bit
Symbol
Description
7 to 0
<timer countdown value>
This register holds the loaded countdown value ‘n’.
Countdown period
n
Source clock frequency
----------------------------------------------------------
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PCF8563T-F4 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Real-time clock/calendar |
| PCF8563TF4.118 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Real-time clock/calendar |
| PCF8563TS | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Real-time clock/calendar |
| PCF8563TS/4 | 制造商:NXP Semiconductors 功能描述:RTC/Calender,1.8-5.5V,PCF8563TS/4 |
| PCF8563TS/4,118 | 功能描述:实时时钟 ULTRA LOW PWR CLOCK CALENDAR RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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