參數(shù)資料
型號(hào)： DS17887-3
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 5/31頁(yè)
文件大?。?/td> 0K
描述： IC RTC 3V 8K NV RAM 24-EDIP
標(biāo)準(zhǔn)包裝： 14
類型： 時(shí)鐘/日歷
特點(diǎn)： 警報(bào)器，夏令時(shí)，閏年，NVSRAM，方波輸出
存儲(chǔ)容量： 8KB
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： 并聯(lián)
電源電壓： 2.7 V ~ 3.7 V
電壓 - 電源，電池： 2.5 V ~ 3.7 V
工作溫度： 0°C ~ 70°C
安裝類型： 通孔
封裝/外殼： 24-DIP 模塊（0.600"，15.24mm）
供應(yīng)商設(shè)備封裝： 24-EDIP
包裝： 管件
The alarm bytes can be used in two ways. First, when
the alarm time is written in the appropriate hours, min-
utes, and seconds alarm locations, the alarm interrupt
is initiated at the specified time each day, if the alarm
enable bit is high. In this mode, the “0” bits in the alarm
registers and the corresponding time registers must
always be written to 0 (see Table 3A and 3B). Writing
the 0 bits in the alarm and/or time registers to 1 can
result in undefined operation.
The second use condition is to insert a “don’t care”
state in one or more of the alarm bytes. The don’t care
code is any hexadecimal value from C0 to FF. The two
most significant bits of each byte set the don’t care
condition when at logic 1. An alarm will be generated
each hour when the “don’t care” bits are set in the
hours byte. Similarly, an alarm is generated every
minute with don’t care codes in the hours and minute
alarm bytes. An alarm is generated every second with
don’t care codes in the hours, minutes, and seconds
alarm bytes.
All 128 bytes can be directly written or read except for
the following:
1) Registers C and D are read-only.
2) Bit 7 of register A is read-only.
3) The MSB of the seconds byte is read-only.
DS17285/DS17287/DS17485/DS17487/DS17885/DS17887
Real-Time Clocks
____________________________________________________________________
13
Table 3A. Time, Calendar, and Alarm Data Modes—BCD Mode (DM = 0)
Note: Unless otherwise specified, the state of the registers is not defined when power is first applied. Except for the seconds regis-
ter, 0 bits in the time and date registers can be written to 1, but can be modified when the clock updates. 0 bits should always be
written to 0 except for alarm mask bits.
ADDRESS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
FUNCTION
RANGE
00h
0
10 Seconds
Seconds
00–59
01h
0
10 Seconds
Seconds
Seconds Alarm
00–59
02h
0
10 Minutes
Minutes
00–59
03h
0
10 Minutes
Minutes
Minutes Alarm
00–59
AM/PM
0
10 Hour
04h
0
10 Hour
Hours
1–12 +AM/PM
00–23
AM/PM
0
10 Hour
05h
0
10 Hour
Hours
Hours Alarm
1–12 +AM/PM
00–23
06h
0
Day
01–07
07h
0
10 Date
Date
01–31
08h
0
10 Month
Month
01–12
09h
10 Year
Year
00–99
0Ah
UIP
DV2
DV1
DV0
RS3
RS2
RS1
RS0
Control
—
0Bh
SET
PIE
AIE
UIE
SQWE
DM
24/12
DSE
Control
—
0Ch
IRQF
PF
AF
UF
0
Control
—
0Dh
VRT
0
Control
—
Bank 1, 48h
10 Century
Century
00–99
Bank 1, 49h
10 Date
Date
Date Alarm
01–31
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參數(shù)描述
DS17887-3+ 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
DS17887-3IND 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Real-Time Clocks
DS17887-3-IND 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
DS17887-3IND+ 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
DS17887-5 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
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