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參數(shù)資料
| 型號： | DS3234S |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM |
| 中文描述： | 非常精確的時鐘SPI總線集成晶體和SRAM |
| 文件頁數(shù)： | 16/20頁 |
| 文件大小： | 328K |
| 代理商： | DS3234S |
D
Extremely Accurate SPI Bus RTC with
Integrated Crystal and SRAM
16
____________________________________________________________________
Aging Offset Register (10h/90h)
The aging offset register provides an 8-bit code to add
to or subtract from the oscillator capacitor array. The
data is encoded in two’s complement, with bit 7 repre-
senting the SIGN bit. One LSB represents the smallest
capacitor to be switched in or out of the capacitance
array at the crystal pins. The offset register is added to
the capacitance array during a normal temperature
conversion, if the temperature changes from the previ-
ous conversion, or during a manual user conversion
(setting the CONV bit). To see the effects of the aging
register on the 32kHz output frequency immediately, a
manual conversion should be performed after each
aging offset register change.
Positive aging values add capacitance to the array,
slowing the oscillator frequency. Negative values
remove capacitance from the array, increasing the
oscillator frequency.
The change in ppm per LSB is different at different tem-
peratures. The frequency vs. temperature curve is shift-
ed by the values used in this register. At +25°C, one
LSB typically provides about 0.1ppm change in fre-
quency. These bits are all set to logic 0 when power is
first applied.
Temperature Registers (11h–12h)
Temperature is represented as a 10-bit code with a res-
olution of 0.25°C and is accessible at location 11h and
12h. The temperature is encoded in two’s complement
format, with bit 7 in the MSB representing the SIGN bit.
The upper 8 bits are at location 11h and the lower 2 bits
are in the upper nibble at location 12h. Upon power
reset, the registers are set to a default temperature of
0°C and the controller starts a temperature conversion.
New temperature readings are stored in this register.
BIT 7
SIGN
0
BIT 6
DATA
0
BIT 5
DATA
0
BIT 4
DATA
0
BIT 3
DATA
0
BIT 2
DATA
0
BIT 1
DATA
0
BIT 0
DATA
0
NAME:
POR*:
Aging Offset (10h/90h)
BIT 7
SIGN
0
BIT 6
DATA
0
BIT 5
DATA
0
BIT 4
DATA
0
BIT 3
DATA
0
BIT 2
DATA
0
BIT 1
DATA
0
BIT 0
DATA
0
NAME:
POR*:
Temperature Register (MSB) (11h)
BIT 7
DATA
0
BIT 6
DATA
0
BIT 5
0
0
BIT 4
0
0
BIT 3
0
0
BIT 2
0
0
BIT 1
0
0
BIT 0
0
0
NAME:
POR*:
Temperature Register (LSB) (12h)
*
POR is defined as the first application of power to the device, either V
BAT
or V
CC
.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS3234S- | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM |
| DS3234S# | 功能描述:實時時鐘 Integrated RTC/TCXO/Crystal 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS3234S# | 制造商:Maxim Integrated Products 功能描述:RTC TCXO CRYSTAL 3.3V 20SOIC 制造商:Maxim Integrated Products 功能描述:RTC, TCXO, CRYSTAL, 3.3V, 20SOIC 制造商:Maxim Integrated Products 功能描述:RTC, TCXO, CRYSTAL, 3.3V, 20SOIC; Date Format:DD:MM:YYYY; Clock Format:HH:MM:SS; Clock IC Type:RTC; Supply Voltage Min:2V; Supply Voltage Max:5.5V; Digital IC Case Style:SOIC; No. of Pins:20; Interface Type:SPI; Operating Temperature;RoHS Compliant: Yes |
| DS3234S#T&R | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 256BYTE 20SOIC W - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC W/TCXO 20-SOIC |
| DS3234S#T&R | 功能描述:實時時鐘 Integrated RTC/TCXO/Crystal 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
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