參數(shù)資料
型號(hào)： DS17285E-3
廠(chǎng)商： DALLAS SEMICONDUCTOR
元件分類(lèi)： Timer or RTC
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDSO28
封裝： TSOP-28
文件頁(yè)數(shù)： 2/38頁(yè)
文件大?。?/td> 415K
代理商： DS17285E-3
DS17285/DS17287
10 of 38
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 internal functions of the
DS17285/DS17287.
PIE - The Periodic Interrupt Enable 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 DS17285/DS17287 functions.
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 internal functions of the DS17285/DS17287 do
not affect the AIE bit.
UIE - The Update Ended Interrupt Enable (UIE) bit is a read/write bit that enables the Update End Flag
(UF) bit in Register C to assert IRQ . The SET bit going high clears the UIE bit.
SQWE - When the Square Wave Enable (SQWE) bit is set to a 1 and E32K=0, a square wave signal at
the frequency set by the rate-selection bits RS3 through RS0 is driven out on the SQW pin. When the
SQWE bit is set to 0 and E32K=0, the SQW pin is held low. SQWE is a read/write bit. SQWE is set to a
1 when VCC is powered up.
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. A 1 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.
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 zero. This bit is not affected by internal functions.
相關(guān)PDF資料
PDF描述
DS17285E-5 1 TIMER(S), REAL TIME CLOCK, PDSO28
DS17285S-5 1 TIMER(S), REAL TIME CLOCK, PDSO24
DS17285SN-5 1 TIMER(S), REAL TIME CLOCK, PDSO24
DS17285EN-3 1 TIMER(S), REAL TIME CLOCK, PDSO28
DS17285S-3 1 TIMER(S), REAL TIME CLOCK, PDSO24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS17285E-3+ 功能描述:實(shí)時(shí)時(shí)鐘 3V/5V RTC K Multiplexed Kick-S RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)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
DS17285E5 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Real-Time Clocks
DS17285E-5 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(xiàn)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
DS17285E-5+ 功能描述:實(shí)時(shí)時(shí)鐘 3V/5V RTC K Multiplexed Kick-S RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)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
DS17285EN- 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:Real-Time Clocks
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