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參數(shù)資料
| 型號(hào)： | 1338-31DCGI |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封裝： | 0.150 INCH, ROHS COMPLIANT, SOIC-8 |
| 文件頁(yè)數(shù)： | 21/23頁(yè) |
| 文件大小： | 255K |
| 代理商： | 1338-31DCGI |
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IDT1338
REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM
RTC
IDT REAL-TIME CLOCK WITH BATTERY BACKED NON-VOLATILE RAM 7
IDT1338
REV M 092211
being PM. In the 24-hour mode, bit 5 is the second 10-hour
bit (20–23 hours). If the 12/24-hour mode select is changed,
the hours register must be re-initialized to the new format.
On an I2C START, the current time is transferred to a second
set of registers. The time information is read from these
secondary registers, while the clock continues to run. This
eliminates the need to re-read the registers in case of an
update of the main registers during a read.
Table 4. Control Register (07H)
The control register controls the operation of the SQW/OUT pin and provides oscillator status.
Bit 7: Output Control (OUT). Controls the output level of the SQW/OUT pin when the square-wave output is disabled. If SQWE
= 0, the logic level on the SQW/OUT pin is 1 if OUT = 1; it is 0 if OUT = 0.
Bit 5: Oscillator Stop Flag (OSF). A logic 1 in this bit indicates that the oscillator has stopped or was stopped for some time
period and can be used to judge the validity of the clock and calendar data. This bit is edge triggered, and is set to logic 1 when
the internal circuitry senses the oscillator has transitioned from a normal run state to a STOP condition. The following are
examples of conditions that may cause the OSF bit to be set:
1) The first time power is applied.
2) The voltage present on VCC and VBAT are insufficient to support oscillation.
3) The CH bit is set to 1, disabling the oscillator.
4) External influences on the crystal (i.e., noise, leakage, etc.).
This bit remains at logic 1 until written to logic 0. This bit can only be written to logic 0. Attempting to write OSF to logic 1 leaves
the value unchanged.
Bit 4: Square-Wave Enable (SQWE). When set to logic 1, this bit enables the oscillator output to operate with either VCC or
VBAT applied. The frequency of the square-wave output depends upon the value of the RS0 and RS1 bits.
Bits 1 and 0: Rate Select (RS1 and RS0). These bits control the frequency of the square-wave output when the square-wave
output has been enabled. The table below lists the square-wave frequencies that can be selected with the RS bits.
Table 5. Square Wave Output
Bit #Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Name
OUT
0
OSF
SQWE
0
RS1
RS0
POR
10110011
OUT
RS1
RS0
SQW Output
SQWE
X0
0
1 Hz
1
X
0
1
4.096 kHz
1
X
1
0
8.192 kHz
1
X
1
32.768 kHz
1
0X
X
0
1X
X
1
0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 1339-2DVGI | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 1339-31DCGI8 | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 13715-806-XTD | 300 MHz, OTHER CLOCK GENERATOR, PDSO16 |
| 1374610-3 | INTERCONNECTION DEVICE |
| 1376137-1 | POWER CONNECTOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 1338-31DCGI8 | 功能描述:實(shí)時(shí)時(shí)鐘 .9RTC BASE RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| 1338-31DVGI | 功能描述:實(shí)時(shí)時(shí)鐘 .9RTC BASE RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| 1338-31DVGI8 | 功能描述:實(shí)時(shí)時(shí)鐘 .9RTC BASE RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| 1338320-1 | 制造商:TE Connectivity 功能描述:GUARD, END FEED - Bulk |
| 1338320-2 | 功能描述:GUARD END FEED 制造商:te connectivity amp connectors 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1 |
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