參數(shù)資料
型號(hào)： RX-4045NBAA
元件分類： XO, clock
英文描述： REAL TIME CLOCK, PDSO22
封裝： ROHS COMPLIANT, SON-22
文件頁(yè)數(shù)： 14/37頁(yè)
文件大?。?/td> 554K
代理商： RX-4045NBAA
RX - 4045 SA / NB
Page - 18
MQ442-01
8.5. Alarm W function
The Alarm W function generates interrupt signals (output via the /INT pin) that correspond to specified days, hours,
and minutes.
For description of the Alarm D function, which supports only hour and minute data, see "8.6. Alarm D Function".
Multiple day settings can be selected (such as Monday, Wednesday, Friday, Saturday, and Sunday).
A polling function is also provided to enable checking of each alarm mode by the host.
8.5.1. Related registers
Address
Function
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
1
Minutes
!
M40
M20
M10
M8
M4
M2
M1
2
Hours
!
H20
P, /A
H10
H8
H4
H2
H1
3
Days
!
W4
W2
W1
8
Alarm_W ; Minute
!
WM40
WM20
WM10
WM8
WM4
WM2
WM1
9
Alarm_W ; Hour
!
WH20
WP, /A
WH10
WH8
WH4
WH2
WH1
A
Alarm_W ; Day
!
WW6
WW5
WW4
WW3
WW2
WW1
WW0
Control 1
WALE
DALE
/12, 24
/CLEN2
TEST
CT2
CT1
CT0
E
(Default)
(0)
(0)
(0)
( 0 )
(0)
Control 2
VDSL
VDET
/ XST
PON
/CLEN1
CTFG
WAFG
DAFG
F
(Default)
(0)
(
)
( 1 )
( 0 )
(0)
(0)
(0)
1) The default value is the value that is read (or is set internally) after the PON bit has been set to "1," such as after powering up from 0 V or
recovering from a supply voltage drop.
2) " " indicates write-protected bits. A zero is always read from these bits.
3) "" indicates undefined status.
When the Alarm_W setting matches the current time, /INT pin is set to "L" and the WALE bit is set to "1".
Note: If the current date/time is used as the Alarm_W setting, the alarm will not occur until the counter counts up
to the current date/time (i.e., an alarm will occur next time, not immediately).
During 24-hour clock operation, the "Alarm_W ; Hours" register's bit 5 (WH20, WP, /A) functions as WH20
(two-digit hour display), and during 12-hour clock operation it functions as an AM/PM indicator.
When the Alarm_W function's day values (WW6 to WW0) are all "0" Alarm W does not occur.
1) WALE bit
This bit is used to set up the Alarm W function (to generate alarms matching day, hour, or minute settings).
WALE
Data
Description
0
Alarm_W, match comparison operation invalid
Default
Write / Read
1
Alarm_W, match comparison operation valid (/INT = "L" when
match occurs)
When using the Alarm W function, first set this WALE bit value as "0," then stop the function. Next, set
the day, hour, minute, and the WAFG bit. Finally, set "1" to the WALE bit to set the Alarm W function as
valid. The reason for first setting the WALE bit value as "0" is to prevent /INT = "L" output in the event that
a match between the current time and alarm setting occurs while the alarm setting is still being made.
2) WAFG bit
This bit is valid only when the WALE bit value is "1". When a match occurs between the Alarm_W setting and
the current time, the WAFG bit value becomes "1" approximately 61
s afterward. (There is no effect when the
WALE bit becomes "0".)
The /INT = "L" status that is set at this time can be set to OFF by writing a "0" to this bit.
WAFG
Data
Description
0
/INT pin = OFF (Hi-z)
Default
Write
1
Setting prohibited (do not set this bit value, even though it has no
effect)
0
Alarm_W time setting does not match current time
(This bit's value is always "0" when the WALE bit's setting is "0")
Default
Read
1
Alarm_W setting matches current time
(Result is that bit value is held until cleared to zero)
When a "0" is written to the WAFG bit, provisionally the WAFG bit value is "0" and the /INT pin status is
OFF (Hi-z). However, as long as the WALE bit value is "1" the Alarm W function continues to operate, and
Alarm W occurs again the next time the same specified time arrives. You can stop Alarm W from
occurring by writing "0" to the WALE bit to set this function as invalid.
相關(guān)PDF資料
PDF描述
RX-4045SA-0 REAL TIME CLOCK, PDSO14
RX-4045SA-3 REAL TIME CLOCK, PDSO14
RX-4801JE REAL TIME CLOCK, PDSO20
RX5C348A 4-WIRE SERIAL INTERFACE
RYC8240-4WM SWITCHED CAPACITOR REGULATOR, PDSO16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
RX-4045SA 制造商:EPSON 制造商全稱:EPSON 功能描述:4-wire serial interface high-stability RTC module
RX-4045SA,(AA) 制造商:Epson Toyocom 功能描述:Serial Interface RTC SOP 14pin
RX-4045SAAA 制造商:Epson Toyocom Corporation 功能描述:Cut Tape 制造商:Epson Toyocom Corporation 功能描述:RTC HI STABILITY SERIAL SMD SOP14 制造商:Epson Toyocom Corporation 功能描述:RTC HI STABILITY SERIAL, SMD, SOP14 制造商:Epson Toyocom Corporation 功能描述:RTC HI STABILITY SERIAL, SMD, SOP14; Date Format:YYYY:MM:DD:Hr:Min:Secs; Clock Format:12Hr / 24Hr; Clock IC Type:RTC; Supply Voltage Min:1.7V; Supply Voltage Max:5.5V; Digital IC Case Style:SOP; No. of Pins:14; Interface Type:Serial;;RoHS Compliant: Yes
RX-409 功能描述:烙鐵 SOLDERING TIP RoHS:否 制造商:Weller 產(chǎn)品:Soldering Stations 類型:Digital, Iron, Stand, Cleaner 瓦特:50 W 最大溫度:+ 850 F 電纜類型:US Cord Included
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*