- 您现在的位置：买卖IC网 > PDF目录122717 > 935262403118 (NXP SEMICONDUCTORS) 0 TIMER(S), REAL TIME CLOCK, PDSO8 PDF资料下载
参数资料
| 型号： | 935262403118 |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封装： | 3 MM, PLASTIC, TSSOP-8 |
| 文件页数： | 3/32页 |
| 文件大小： | 711K |
| 代理商： | 935262403118 |
第1页第2页当前第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页
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
----------------------------------------------------------
=
相关PDF资料 |
PDF描述 |
|---|---|
| 935261475512 | 8 CHANNEL(S), 500K bps, SERIAL COMM CONTROLLER, PQCC84 |
| 9LPRS365BKLF | SPECIALTY MICROPROCESSOR CIRCUIT, PQCC64 |
| 91W-G28AC-6-CG9 | SINGLE COLOR DISPLAY CLUSTER, GREEN, 7.1 mm |
| 91W-G5AC-6-CW0 | SINGLE COLOR DISPLAY CLUSTER, GREEN, 7.1 mm |
| 94W-EAY2-S0 | SINGLE COLOR LED, AMBER, 8.5 mm |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 935264217557 | 制造商:NXP Semiconductors 功能描述:SUB ONLY IC |
| 935267356112 | 制造商:NXP Semiconductors 功能描述:IC TEA1507PN |
| 935268081112 | 制造商:NXP Semiconductors 功能描述:SUB ONLY IC |
| 935268721125 | 制造商:NXP Semiconductors 功能描述:Buffer/Line Driver 1-CH Non-Inverting 3-ST CMOS 5-Pin TSSOP T/R |
| 935269304128 | 制造商:ST-Ericsson 功能描述:IC AUDIO CODEC W/TCH SCRN 48LQFP |
发布紧急采购，3分钟左右您将得到回复。