參數(shù)資料
型號(hào)： DS3234
廠商： Maxim Integrated Products, Inc.
英文描述： Extremely Accurate SPI Bus RTC with Integrated Crystal and SRAM
中文描述： 高精度、SPI總線RTC，集成晶體和SRAM
文件頁(yè)數(shù)： 9/20頁(yè)
文件大小： 328K
代理商： DS3234
D
Extremely Accurate SPI Bus RTC with
Integrated Crystal and SRAM
_____________________________________________________________________
9
Detailed Description
The DS3234 is a TCXO and RTC with integrated crystal
and 256 bytes of SRAM. An integrated sensor periodi-
cally samples the temperature and adjusts the oscillator
load to compensate for crystal drift caused by tempera-
ture variations. The DS3234 provides user-selectable
sample rates. This allows the user to select a tempera-
ture sensor sample rate that allows for various tempera-
ture rates of change, while minimizing current
consumption by temperature sensor sampling. The user
should select a sample rate based upon the expected
temperature rate of change, with faster sample rates for
applications where the ambient temperature changes
significantly over a short time. The TCXO provides a sta-
ble and accurate reference clock, and maintains the
RTC to within ±2 minutes per year accuracy from -40°C
to +85°C. The TCXO frequency output is available at the
32kHz pin. The RTC is a low-power clock/calendar with
Block Diagram
N
N
RST
V
CC
INT/SQW
CLOCK AND CALENDAR
REGISTERS
SRAM
USER BUFFER
(7 BYTES)
SPI INTERFACE AND
ADDRESS REGISTER
DECODE
POWER CONTROL
V
CC
V
BAT
GND
SCLK
SCLK
DIN
CS
DOUT
TEMPERATURE
SENSOR
CONTROL LOGIC/
DIVIDER
PUSHBUTTON RESET;
SQUARE-WAVE BUFFER;
INT/SQW CONTROL
CONTROL AND STATUS
REGISTERS
OSCILLATOR AND
CAPACITOR ARRAY
X1
X2
DS3234
32kHz
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