参数资料
型号: DS1923-F5#
厂商: Maxim Integrated
文件页数: 39/55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
BUS MASTER Tx
FROM MEMORY/CONTROL
FUNCTION FLOWCHART (FIGURE 9)
RESET PULSE
FROM FIGURE 11b
BUS MASTER Tx ROM
FUNCTION COMMAND
OD
RESET PULSE?
Y
DS1923 Tx
PRESENCE PULSE
N
OD = 0
33h
READ ROM
COMMAND?
N
55h
MATCH ROM
COMMAND?
N
F0h
SEARCH ROM
COMMAND?
N
ECh
CONDITIONAL SEARCH
COMMAND?
N
TO FIGURE 11b
Y
RC = 0
Y
RC = 0
Y
RC = 0
N
Y
RC = 0
CONDITION
MET?
Y
DS1923 Tx
DS1923 Tx BIT 0
DS1923 Tx BIT 0
FAMILY CODE
(1 BYTE)
MASTER Tx BIT 0
DS1923 Tx BIT 0
MASTER Tx BIT 0
DS1923 Tx BIT 0
MASTER Tx BIT 0
BIT 0 MATCH?
N
N
BIT 0 MATCH?
N
BIT 0 MATCH?
DS1923 Tx
Y
Y
DS1923 Tx BIT 1
Y
DS1923 Tx BIT 1
SERIAL NUMBER
(6 BYTES)
MASTER Tx BIT 1
DS1923 Tx BIT 1
MASTER Tx BIT 1
DS1923 Tx BIT 1
MASTER Tx BIT 1
BIT 1 MATCH?
N
N
BIT 1 MATCH?
N
BIT 1 MATCH?
Y
Y
DS1923 Tx BIT 63
Y
DS1923 Tx BIT 63
DS1923 Tx
CRC BYTE
MASTER Tx BIT 63
DS1923 Tx BIT 63
MASTER Tx BIT 63
DS1923 Tx BIT 63
MASTER Tx BIT 63
BIT 63 MATCH?
N
N
BIT 63 MATCH?
N
BIT 63 MATCH?
Y
Y
Y
RC = 1
RC = 1
RC = 1
TO FIGURE 11b
FROM FIGURE 11b
TO MEMORY/CONTROL
FUNCTION FLOWCHART (FIGURE 9)
Figure 11a. ROM Functions Flowchart
Maxim Integrated
39
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