- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄122717 > 935262403118 (NXP SEMICONDUCTORS) 0 TIMER(S), REAL TIME CLOCK, PDSO8 PDF資料下載
參數(shù)資料
| 型號： | 935262403118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復及定時提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封裝： | 3 MM, PLASTIC, TSSOP-8 |
| 文件頁數(shù)： | 28/32頁 |
| 文件大小： | 711K |
| 代理商： | 935262403118 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁當前第28頁第29頁第30頁第31頁第32頁
Philips Semiconductors
PCF8563
Real-time clock/calendar
Product specication
16 April 1999
5 of 30
9397 750 04855
Philips Electronics N.V. 1999. All rights reserved.
8.4 Reset
The PCF8563 includes an internal reset circuit which is active whenever the oscillator
is stopped. In the reset state the I2C-bus logic is initialized and all registers, including
the address pointer, are cleared with the exception of bits FE, VL, TD1, TD0, TESTC
and AE which are set to logic 1.
8.5 Voltage-low detector and clock monitor
The PCF8563 has an on-chip voltage-low detector. When VDD drops below Vlow the
VL bit (Voltage Low, bit 7 in the Seconds register) is set to indicate that reliable
clock/calendar information is no longer guaranteed. The VL ag can only be cleared
by software.
The VL bit is intended to detect the situation when VDD is decreasing slowly for
example under battery operation. Should VDD reach Vlow before power is re-asserted
then the VL bit will be set. This will indicate that the time may be corrupted.
8.6 Register organization
Fig 4.
Voltage-low detection.
handbook, halfpage
VL set
normal power
operation
period of battery
operation
t
VDD
Vlow
MGR887
Table 4:
Registers overview
Bit positions labelled as ‘
’are not implemented; those labelled with ‘0’ should always be written with logic 0.
Address Register name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
00H
Control/Status 1
TEST1
0
STOP
0
TESTC
0
01H
Control/Status 2
0
TI/TP
AF
TF
AIE
TIE
0DH
CLKOUT frequency
FE
FD1
FD0
0EH
Timer control
TE
TD1
TD0
0FH
Timer countdown
value
<timer countdown value>
相關(guān)PDF資料 |
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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。