参数资料
型号: DS1923-F5#
厂商: Maxim Integrated
文件页数: 32/55页
文件大小: 0K
描述: IBUTTON TEMP/HUMIDITY LOGGER F5
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
RoHS指令信息: IButton RoHS Compliance Plan
标准包装: 5
系列: iButton®
存储容量: 512B
存储器类型: NVSRAM(非易失 SRAM)
产品目录页面: 1431 (CN2011-ZH PDF)
DS1923
iButton Hygrochron Temperature/Humidity
Logger with 8KB Data-Log Memory
FROM FIGURE 9a
69h
READ MEMORY [WITH
PW] AND CRC
N
96h
CLEAR MEMORY
[WITH PW]
N
55h
FORCED CONVERSION?
N
TO FIGURE 9c
Y
MASTER Tx
TA1 [T7:T0], TA2 [T15:T8]
MASTER Tx
Y
MASTER Tx
64 BITS [PASSWORD]
MASTER Tx
Y
MASTER Tx
FFh DUMMY BYTE
DECISION MADE
64 BITS [PASSWORD]
FFh DUMMY BYTE
MISSION IN
Y
BY DS1923
PROGRESS?
N
PASSWORD
ACCEPTED?
N
PASSWORD
ACCEPTED?
N
DS1923 PERFORMS A
TEMPERATURE CONVERSION
DECISION MADE
BY MASTER
Y
DS1923 SETS
Y
DS1923 COPIES RESULT TO
MEMORY ADDRESS = [T15:T0]
MISSION IN
Y
ADDRESS 020C/Dh
PROGRESS?
MASTER Rx DATA BYTE FROM
MEMORY ADDRESS
N
DS1923 CLEARS
MISSION TIMESTAMP,
MISSION SAMPLES COUNTER,
DS1923 PERFORMS A
HUMIDITY CONVERSION
Y
MASTER Tx RESET?
DS1923
INCREMENTS
ADDRESS
ALARM FLAGS
DS1923 COPIES RESULT TO
ADDRESS 020E/Fh
COUNTER
N
DS1923 SETS
MEMCLR = 1
N
MASTER Tx RESET?
END OF PAGE?
N
Y
MASTER Rx CRC-16 OF
COMMAND, ADDRESS, DATA
(1ST PASS); CRC-16 OF DATA
(SUBSEQUENT PASSES)
N
MASTER Tx RESET?
Y
Y
MASTER Tx RESET
N
CRC OK?
Y
END OF MEMORY?
N
Y
MASTER Rx "1"s
TO FIGURE 9a
MASTER Tx RESET?
Y
N
FROM FIGURE 9c
Figure 9b. Memory/Control Function Flowchart (continued)
32
Maxim Integrated
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