參數(shù)資料
型號(hào)： DS14285SN
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類(lèi)： Timer or RTC
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDSO24
封裝： 0.300 INCH, SOP-24
文件頁(yè)數(shù)： 3/26頁(yè)
文件大?。?/td> 515K
代理商： DS14285SN
DS14285/DS14287
11 of 26
REGISTER B
MSB
LSB
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
SET
PIE
AIE
UIE
SQWE
DM
24/12
DSE
SET - When the SET bit is a 0, the update transfer functions normally by advancing the counts once per
second. When the SET bit is written to a 1, any update transfer is inhibited and the program can initialize
the time and calendar bytes without an update occurring in the midst of initializing. Read cycles can be
executed in a similar manner. SET is a read/write bit that is not modified by RESET or internal functions
of the DS14285/DS14287.
PIE - The periodic interrupt enable PIE bit is a read/write bit which allows the Periodic Interrupt Flag
(PF) bit in Register C to drive the IRQ pin low. When the PIE bit is set to 1, periodic interrupts are
generated by driving the IRQ pin low at a rate specified by the RS3-RS0 bits of Register A. A 0 in the
PIE bit blocks the IRQ output from being driven by a periodic interrupt, but the Periodic Flag (PF) bit is
still set at the periodic rate. PIE is not modified by any internal DS14285/DS14287 functions, but is
cleared to 0 on RESET .
AIE - The Alarm Interrupt Enable (AIE) bit is a read/write bit which, when set to a 1, permits the Alarm
Flag (AF) bit in register C to assert IRQ . An alarm interrupt occurs for each second that the 3 time bytes
equal the 3 alarm bytes including a “don’t care” alarm code of binary 11XXXXXX. When the AIE bit is
set to 0, the AF bit does not initiate the IRQ signal. The RESET pin clears AIE to 0. The internal
functions of the DS14285/DS14287 do not affect the AIE bit.
UIE - The Update Ended Interrupt Enable (UIE) bit is a read/write that enables the Update End Flag (UF)
bit in Register C to assert IRQ . The RESET pin going low or the SET bit going high clears to UIE bit.
SQWE - When the Square Wave Enable (SQWE) bit is set to a 1, a square wave signal at the frequency
set by the rate-selection bits RS3 through RS0 is driven out on a SQW pin. When the SQWE bit is set to
0, the SQW pin is held low; the state of SQWE is cleared by the RESET pin. SQWE is a read/write bit.
DM - The Data Mode (DM) bit indicates whether time and calendar information is in binary or BCD
format. The DM bit is set by the program to the appropriate format and can be read as required. This bit is
not modified by internal functions or RESET . A one in DM signifies binary data while a 0 in DM
specifies Binary Coded Decimal (BCD) data.
24/12 - The 24/12 control bit establishes the format of the hours byte. A 1 indicates the 24-hour mode and
a 0 indicates the 12-hour mode. This bit is read/write and is not affected by internal functions of RESET .
DSE - The Daylight Savings Enable (DSE) bit is a read/write bit which enables two special updates when
DSE is set to 1. On the first Sunday in April the time increments from 1:59:59 AM to 3:00:00 AM. On
the last Sunday in October when the time first reaches 1:59:59 AM it changes to 1:00:00 AM. These
special updates do not occur when the DSE bit is a 0. This bit is not affected by internal functions or
RESET
.
相關(guān)PDF資料
PDF描述
DS14285Q 1 TIMER(S), REAL TIME CLOCK, PQCC28
DS14285 1 TIMER(S), REAL TIME CLOCK, PDIP24
DS1670S 0 TIMER(S), REAL TIME CLOCK, PDSO20
DS14287 1 TIMER(S), REAL TIME CLOCK, PDIP24
DS1670E 0 TIMER(S), REAL TIME CLOCK, PDSO20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS14285SN/T&R 制造商:Maxim Integrated Products 功能描述:IC RTC W/NV RAM CNTRL IND 24SOIC
DS14285SN/T&R 功能描述:IC RTC W/NV RAM CNTRL IND 24SOIC RoHS:否 類(lèi)別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 實(shí)時(shí)時(shí)鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:時(shí)鐘/日歷 特點(diǎn):警報(bào)器，閏年，SRAM 存儲(chǔ)容量:- 時(shí)間格式:HH:MM:SS（12/24 小時(shí)） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件
DS14285SN/TR 制造商:DALLAS 制造商全稱(chēng):Dallas Semiconductor 功能描述:Real-Time Clock with NV RAM
DS14285SN+ 功能描述:實(shí)時(shí)時(shí)鐘 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
DS14285SN+T&R 制造商:Maxim Integrated Products 功能描述:IC RTC W/NV RAM CNTRL 24-SOIC 制造商:DSC 功能描述:
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