参数资料
型号: DS1921Z-F5#
厂商: Maxim Integrated
文件页数: 27/45页
文件大小: 0K
描述: IBUTTON THERMOCHRON 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: 8
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)
ROM FUNCTIONS FLOW CHART Figure 13-1
DS1921H/Z
From Figure 13
2 Part
From Memory Functions
Flow Chart (Figure 10)
Master TX
Reset Pulse
Short
Reset Pulse?
Y
DS1921 TX
Presence Pulse
Master TX ROM
Function Command
N
2)
1)
OD = 0
nd
To Figure 13
2 Part
33H
Read
ROM?
N
55H
Match
ROM?
N
F0H
Search
ROM?
N
ECH
Cond. Search
ROM?
N
nd
Y
Y
Y
N
Y
Cond. Met?
Y
DS1921 TX
Family Code
1 Byte
1)
Master TX Bit 0
Bit 0 Match?
1)
N
N
DS1921 TX Bit 0
DS1921 TX Bit 0
Master TX Bit 0
Bit 0 Match?
1)
1)
1)
N
DS1921 TX Bit 0
DS1921 TX Bit 0
Master TX Bit 0
Bit 0 Match?
1)
1)
1)
Y
Y
Y
DS1921 TX
Temp. Range
Code and
Serial Number
6 Bytes
1)
Master TX Bit 1
Bit 1 Match?
1)
N
N
DS1921 TX Bit 1
DS1921 TX Bit 1
Master TX Bit 1
Bit 1 Match?
1)
1)
1)
N
DS1921 TX Bit 1
DS1921 TX Bit 1
Master TX Bit 1
Bit 1 Match?
1)
1)
1)
Y
Y
Y
DS1921 TX
CRC Byte
1)
Master TX Bit 63
1)
DS1921 TX Bit 63 1)
DS1921 TX Bit 63 1)
1)
Master TX Bit 63
DS1921 TX Bit 63 1)
DS1921 TX Bit 63 1)
1)
Master TX Bit 63
To Figure 13
2 Part
Bit 63 Match?
Y
N
N
Bit 63 Match?
Y
N
Bit 63 Match?
Y
nd
From Figure 13
2 Part
1)
2)
To be transmitted or received at Overdrive speed if
OD = 1.
The Presence Pulse will be short if OD = 1.
To Memory Functions
Flow Chart (Figure 10)
nd
27 of 45
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