參數(shù)資料
型號: DS1687-3IND
廠商: Maxim Integrated Products
文件頁數(shù): 10/34頁
文件大?。?/td> 0K
描述: IC RTC 3V 64-BIT Y2K 24-EDIP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準包裝: 14
類型: 時鐘/日歷
特點: 警報器,NVSRAM,方波輸出,Y2K
存儲容量: 242B
時間格式: HH:MM:SS(12/24 小時)
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: -40°C ~ 85°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
DS1685/DS1687 3V/5V Real-Time Clocks
18 of 34
Figure 5. DS1685/DS1687 Register Map and Extended Register Bank Definition
MSB
BANK 0 DV0
= 0
LSB
MSB
BANK 1
DV0 =
1
LSB
00
TIMEKEEPING AND CONTROL
00
TIMEKEEPING AND CONTROL
0D
0E
50 BYTES-USER RAM
0E
50 BYTES-USER RAM
3F
7F
64 BYTES-USER RAM
40
MODEL NUMBER BYTE
41
1ST BYTE SERIAL NUMBER
42
2ND BYTE SERIAL NUMBER
43
3RD BYTE SERIAL NUMBER
44
4TH BYTE SERIAL NUMBER
45
5TH BYTE SERIAL NUMBBER
46
6TH BYTE SERIAL NUMBER
47
CRC BYTE
48
CENTURY BYTE
49
DATE ALARM
4A
EXTENDED CONTROL REG 4A
4B
EXTENDED CONTROL REG 4B
4C
RESERVED
4D
RESERVED
4E
RTC ADDRESS-2
4F
RTC ADDRESS-3
50
EXTENDED RAM ADDRESS
51
RESERVED
52
RESERVED
53
EXTENDED RAM DATA PORT
54
RESERVED
7F
When bank 1 is selected, the clock/calendar registers and the original 50 bytes of user RAM still appear as bank 0.
However, the registers that provide control and status for the extended functions are accessed in place of the
additional 64 bytes of user RAM. The major functions controlled by the extended registers are listed below:
1) 64-Bit Silicon Serial Number
2) Century counter
3) Date Alarm
4) Auxiliary Battery Control/Status
5) Wake Up
6) Kickstart
7) RAM Clear Control/Status
8) 128 Bytes Extended RAM Access
The bank selection is controlled by the state of the DV0 bit in register A. To access bank 0, the DV0 bit should be
written to a 0. To access bank 1, DV0 should be written to a 1. Register locations designated as reserved in the
bank 1 map are reserved for future use by Maxim Integrated. Bits in these locations cannot be written and return a
0 if read.
EXTENDED
RAM
128 x 8
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