- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385272 > DS17485 (Maxim Integrated Products, Inc.) 3 Volt/5 Volt Real Time Clock(3V/5V實(shí)時(shí)時(shí)鐘) PDF資料下載
參數(shù)資料
| 型號(hào)： | DS17485 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 3 Volt/5 Volt Real Time Clock(3V/5V實(shí)時(shí)時(shí)鐘) |
| 文件頁數(shù)： | 17/32頁 |
| 文件大?。?/td> | 236K |
| 代理商： | DS17485 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁當(dāng)前第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
DS17485/DS17487
030598 17/32
WF
–
Wake up Alarm Flag – This bit is set to 1 when a
wake up alarm condition occurs or when the user writes
it to a 1. WF is cleared by writing it to a 0.
KF
–
Kickstart Flag – This bit is set to a 1 when a kick-
start condition occurs or when the user writes it to a 1.
This bit is cleared by writing it to a logic 0.
EXTENDED CONTROL REGISTER 4B
MSB
LSB
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
ABE
E32K
CS
RCE
PRS
RIE
WIE
KSE
ABE
–
Auxiliary Battery Enable. This bit when written to
a logic 1 will enable the V
BAUX
pin for extended func-
tions.
E32K
–
Enable 32.768 KHz output. This bit when writ-
ten to a logic 1 will enable the 32.768 KHz oscillator fre-
quency to be output on the SQW pin. E32K is set to a
one when V
CC
is powered up.
CS
–
Crystal Select Bit. When CS is set to a 0, the oscil-
lator is configured for operation with a crystal that has a
6 pF specified load capacitance. When CS=1, the oscil-
lator is configured for a 12.5 pF crystal.
RCE
–
RAM Clear Enable bit. When set to a 1, this bit
enables a low level on RCLR to clear all 114 bytes of
user RAM. When RCE = 0, RCLR and the RAM clear
function are disabled.
PRS
–
PAB Reset Select Bit. When set to a 0 the PWR
pin will be set Hi–Z when the DS17485 goes into power
fail. When set to a 1, the PWR pin will remain active
upon entering power fail.
RIE
–
Ram Clear Interrupt Enable. When RIE is set to a
1, the IRQ pin will be driven low when a RAM clear func-
tion is completed.
WIE
–
Wake Up Alarm Interrupt Enable. When V
CC
volt-
age is absent and WIE is set to a 1, the PWR pin will be
driven active low when a wake up condition occurs,
causing the WF bit to be set to 1. When V
CC
is then
applied, the IRQ pin will also be driven low. If WIE is set
while system power is applied, both IRQ and PWR will
be driven low in response to WF being set to 1. When
WIE is cleared to a 0, the WF bit will have no effect on the
PWR or IRQ pins.
KSE
–
Kickstart Interrupt Enable. When V
CC
voltage is
absent and KSE is set to a 1, the PWR pin will be driven
active low when a kickstart condition occurs (KS pulsed
low), causing the KF bit to be set to 1. When V
CC
is then
applied, the IRQ pin will also be driven low. If KSE is set
to 1 while system power is applied, both IRQ and PWR
will be driven low in response to KF being set to 1. When
KSE is cleared to a 0, the KF bit will have no effect on the
PWR or IRQ pins.
*
Reserved bits. These bits are reserved for future use
by Dallas Semiconductor. They can be read and writ-
ten, but have no effect on operation.
SYSTEM MAINTENANCE INTERRUPT (SMI)
RECOVERY STACK
An SMI recovery register stack is located in the
extended register bank, locations 4Eh and 4Fh. This
register stack, shown below, can be used by the BIOS to
recover from an SMI occurring during an RTC read or
write.
RTC ADDRESS
RTC ADDRESS – 1
RTC ADDRESS – 2
RTC ADDRESS – 3
4Eh
4Fh
SMI RECOVERY STACK
DV0
AD6
AD0
AD5
AD4
AD3
AD2
AD1
REGISTER BIT DEFINITION
7
6
5
4
3
2
1
0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1775 | SOT23 Digital Thermometer and Thermostat(SOT23數(shù)字溫度計(jì)和恒溫控制器) |
| DS1800 | Dual Inverting Log Gain/Attenuator(雙路反相對(duì)數(shù)放大/衰減器) |
| DS1801 | Dual Audio Taper Potentiometer(雙路音頻抽頭電位器) |
| DS1802 | Dual Audio Taper Potentiometer with Push Button Control(帶按鈕控制的雙路音頻抽頭電位器) |
| DS1803 | Addressable Dual Digital Potentiometer(可尋址雙路數(shù)字電位器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS17485-3 | 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 |
| DS17485-3+ | 功能描述:實(shí)時(shí)時(shí)鐘 3V/5V RTC 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 |
| DS17485-5 | 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 |
| DS17485-5+ | 功能描述:實(shí)時(shí)時(shí)鐘 3V/5V RTC 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 |
| DS1748555 | 制造商:Maxim Integrated Products 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。