参数资料
型号: DS18S20Z/T&R
厂商: Maxim Integrated
文件页数: 17/23页
文件大小: 0K
描述: IC THERM MICROLAN HI-PREC 8-SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
感应温度: -55°C ~ 125°C
输出类型: 数字
电源电压: 3 V ~ 5.5 V
精确度: ±0.5°C
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 带卷 (TR)
DS18S20
Figure 15. DS18S20 Function Commands Flowchart
MASTER T X
FUNCTION
COMMAND
44h
CONVERT
TEMPERATURE
?
N
48h
COPY
SCRATCHPAD
?
N
Y
Y
N
PARASITE
POWER
?
Y
N
PARASITE
POWER
?
Y
DS18S20 BEGINS
CONVERSION
MASTER ENABLES
STRONG PULLUP ON DQ
MASTER ENABLES
STRONG PULL-UP ON DQ
DEVICE
CONVERTING
TEMPERATURE
?
Y
MASTER
R X “0s”
N
MASTER
R X “1s”
DS18S20 CONVERTS
TEMPERATURE
MASTER DISABLES
STRONG PULLUP
COPY IN
PROGRESS
?
Y
MASTER
R X “0s”
N
MASTER
R X “1s”
DATA COPIED FROM
SCRATCHPAD TO EEPROM
MASTER DISABLES
STRONG PULLUP
N
B4h
READ
POWER SUPPLY
?
N
B8h
RECALL E
?
2
N
BEh
READ
SCRATCHPAD
?
N
4Eh
WRITE
SCRATCHPAD
?
Y
Y
Y
Y
RECALL FROM E PROM
N
PARASITE
POWERED
?
Y
MASTER BEGINS DATA
2
MASTER R X DATA BYTE
FROM SCRATCHPAD
MASTER T X T H BYTE
TO SCRATCHPAD
MASTER T X T L BYTE
TO SCRATCHPAD
MASTER
R X “1s”
MASTER
R X “0s”
DEVICE
BUSY RECALLING
DATA
?
Y
MASTER
R X “0s”
N
MASTER
R X “1s”
N
MASTER
T X RESET
?
N
HAVE 8 BYTES
BEEN READ
?
Y
Y
MASTER R X SCRATCHPAD
CRC BYTE
RETURN TO INITIALIZATION
SEQUENCE (FIGURE 14) FOR
NEXT TRANSACTION
17 of 23
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