参数资料
| 型号： | DS3234S# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/21页 |
| 文件大小： | 0K |
| 描述： | IC RTC W/TCXO 20-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 45 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，NVSRAM，方波输出，TCXO/晶体 |
| 存储容量： | 256B |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | SPI |
| 电源电压： | 2 V ~ 5.5 V |
| 电压 - 电源，电池： | 2 V ~ 3.8 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC W |
| 包装： | 管件 |
| 产品目录页面： | 1434 (CN2011-ZH PDF) |
DS3234
Extremely Accurate SPI Bus RTC with
Integrated Crystal and SRAM
____________________________________________________________________
15
Control/Status Register (0Fh/8Fh)
Bit 7: Oscillator Stop Flag (OSF). A logic 1 in this bit
indicates that the oscillator either is stopped or was
stopped for some period and may be used to judge the
validity of the timekeeping data. This bit is set to logic 1
any time that the oscillator stops. The following are
examples of conditions that can cause the OSF bit to
be set:
1) The first time power is applied.
2) The voltages present on both VCC and VBAT are
insufficient to support oscillation.
3) The EOSC bit is turned off in battery-backed mode.
4) External influences on the crystal (i.e., noise, leak-
age, etc.).
This bit remains at logic 1 until written to logic 0.
Bit 6: Battery-Backed 32kHz Output (BB32kHz). This
bit enables the 32kHz output when powered from VBAT
(provided EN32kHz is enabled). If BB32kHz = 0, the
32kHz output is low when the part is powered by VBAT.
This bit is enabled (logic 1) when power is first applied.
Bits 5 and 4: Conversion Rate (CRATE1 and
CRATE0). These two bits control the sample rate of the
TCXO. The sample rate determines how often the tem-
perature sensor makes a conversion and applies com-
pensation to the oscillator. Decreasing the sample rate
decreases the overall power consumption by decreas-
ing the frequency at which the temperature sensor
operates. However, significant temperature changes
that occur between samples may not be completely
compensated for, which reduce overall accuracy.
These bits are set to logic 0 when power is first applied.
Bit 3: Enable 32kHz Output (EN32kHz). This bit indi-
cates the status of the 32kHz pin. When set to logic 1,
the 32kHz pin is enabled and outputs a 32.768kHz
square-wave signal. When set to logic 0, the 32kHz pin is
low. The initial power-up state of this bit is logic 1, and a
32.768kHz square-wave signal appears at the 32kHz pin
after a power source is applied to the DS3234. This bit is
enabled (logic 1) when power is first applied.
Bit 2: Busy (BSY). This bit indicates the device is busy
executing TCXO functions. It goes to logic 1 when the
conversion signal to the temperature sensor is asserted
and then is cleared when the conversion is complete.
Bit 1: Alarm 2 Flag (A2F). A logic 1 in the alarm 2 flag
bit indicates that the time matched the alarm 2 regis-
ters. If the A2IE bit and INTCN bit are set to logic 1, the
INT/SQW pin is driven low while A2F is active. A2F is
cleared when written to logic 0. This bit can only be
written to logic 0. Attempting to write to logic 1 leaves
the value unchanged.
Bit 0: Alarm 1 Flag (A1F). A logic 1 in the alarm 1 flag
bit indicates that the time matched the alarm 1 regis-
ters. If the A1IE bit and the INTCN bit are set to logic 1,
the INT/SQW pin is driven low while A1F is active. A1F
is cleared when written to logic 0. This bit can only be
written to logic 0. Attempting to write to logic 1 leaves
the value unchanged.
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
NAME:
OSF
BB32kHz
CRATE1
CRATE0
EN32kHz
BSY
A2F
A1F
POR*:
1
0
1
0
Control/Status Register (0Fh/8Fh)
*
POR is defined as the first application of power to the device, either VBAT or VCC.
CRATE1
CRATE0
SAMPLE RATE
(seconds)
00
64
0
1
128
1
0
256
1
512
相关PDF资料 |
PDF描述 |
|---|---|
| DS32C35-33#T&R | IC RTC ACCURATE I2C 3.3V 20-SOIC |
| DS3911T+ | IC DAC 10BIT I2C QUAD 14TDFN |
| DS4000KI/WBGA | IC OSC TCXO 19.44MHZ 24-BGA |
| DS4026S+WCN | IC OSC TCXO 25MHZ 16-SOIC |
| DS4100HW+ | IC OSC CLOCK 100MHZ 10LCCC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS3234S# | 功能描述:实时时钟 Integrated RTC/TCXO/Crystal RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装: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:实时时钟 Integrated RTC/TCXO/Crystal RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS3234S+ | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
发布紧急采购，3分钟左右您将得到回复。