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參數(shù)資料
| 型號： | RX-4045NBAA |
| 元件分類： | XO, clock |
| 英文描述： | REAL TIME CLOCK, PDSO22 |
| 封裝： | ROHS COMPLIANT, SON-22 |
| 文件頁數(shù)： | 16/37頁 |
| 文件大小： | 554K |
| 代理商： | RX-4045NBAA |
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RX - 4045 SA / NB
Page - 20
MQ442-01
8.6. Alarm D function
The Alarm D function generates interrupt signals (output via the /INT pin) that correspond to specified hours and
minutes.
For description of the Alarm W function, which supports only day, hour, and minute data, see "8.5. Alarm W Function".
A polling function is also provided to enable checking of each alarm mode by the host.
8.6.1. 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
B
Alarm_D ; Minute
!
DM40
DM20
DM10
DM8
DM4
DM2
DM1
C
Alarm_D ; Hour
!
DH20
DP , /A
DH10
DH8
DH4
DH2
DH1
Control 1
WALE
DALE
/12 , 24
/CLEN2
TEST
CT2
CT1
CT0
E
(Default)
(0)
( 0 )
(0)
Control 2
VDSL
VDET
/ XST
PON
/CLEN1
CTFG
WAFG
DAFG
F
(Default)
(0)
(
)
( 1 )
( 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_D setting matches the current time, /INT pin is set to "L" and the DALE bit is set to "1".
Note: If the current date/time is used as the Alarm_D 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_D ; Hours" register's bit 5 (DH20, DP, /A) functions as DH20 (two-digit
hour display), and during 12-hour clock operation it functions as an AM/PM indicator.
1) DALE bit
This bit is used to set up the Alarm D function (to generate alarms matching hour or minute settings).
DALE
Data
Description
0
Alarm_D, match comparison operation invalid
Default
Write / Read
1
Alarm_D, match comparison operation valid (/INT = "L" when
match occurs)
When using the Alarm D function, first set this DALE bit value as "0," then stop the function. Next, set the
hour, minute, and the DAFG bit. Finally, set "1" to the DALE bit to set the Alarm D function as valid.
The reason for first setting the DALE 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) DAFG bit
This bit is valid only when the DALE bit value is "1". When a match occurs between the Alarm_D setting and the
current time, the DAFG bit value becomes "1" approximately 61
s afterward. (There is no effect when the DALE
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.
DAFG
Data
Description
0
/INT pin = OFF (Hi-z) (only when periodic interrupt output is OFF)
Default
Write
1
Setting prohibited (do not set this bit value, even though it has no
effect)
0
Alarm_D time setting does not match current time
(This bit's value is always "0" when the DALE bit's setting is "0")
Default
Read
1
Alarm_D time setting matches current time
(result is that bit value is held until cleared to zero)
When a "0" is written to the DAFG bit, provisionally the DAFG bit value is "0" and the /INT pin status is
OFF (Hi-z). However, as long as the DALE bit value is "1" the Alarm D function continues to operate, and
Alarm D occurs again the next time the same specified time arrives.
You can stop Alarm D from occurring by writing "0" to the DALE bit to set this function as invalid.
3) /12,24 bit
See "/12, 24 bit" in section 8.5.1.3.
8.6.2. WAFG, DAFG and /INT, /INT output
See "WAFG, DAFG and /INT output" in section 8.7.2.
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相關代理商/技術參數(shù) |
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| 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 |
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