参数资料
型号: DS1992L-F5+
厂商: Maxim Integrated
文件页数: 7/17页
文件大小: 0K
描述: IBUTTON MEMORY 1KBit 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: 25
系列: iButton®
存储容量: 128B
存储器类型: NVRAM
产品目录页面: 1431 (CN2011-ZH PDF)
DS1992/DS1993
Figure 6. MEMORY FUNCTIONS FLOW CHART
Master TX Memory
Function Command
0FH
Write
Scratchpad
?
Y
N
AAH
Read
Scratchpad
?
Y
To Figure 6
Second Part
Bus Master TX
TA1 (T7:T0)
Bus Master TX
TA2 (T15:T8)
DS199x sets Scratchpad
Offset = (T4:T0) and
Clears (PF, OF, AA)
Master TX Data Byte
To Scratchpad Offset
DS199x sets (E4:E0)
= Scratchpad Offset
Bus Master RX
TA1 (T7:T0)
Bus Master RX
TA2 (T15:T8)
Master RX Ending
Offset with Data
Status (E/S)
DS199x Sets
Scratchpad
Offset=(T4:T0)
Master RX Data
Byte From
Scratchpad Offset
Y
DS199x Increments
Scratchpad Offset
N
Bus Master
TX Reset
?
N
Scratch-
pad Offset =
11111b ?
Y
Y
DS199x Increments
Scratchpad Offset
N
Partial
Byte Written
?
Bus Master
TX Reset
?
N
Scratch-
pad Offset =
11111b ?
Y
Y
Y
OF = 1
Bus Master
TX Data
?
N
N
PF = 1
Bus Master
RX "1"s
N
Bus Master
TX Reset
?
Y
7 of 17
DS199x TX
Presence Pulse
(See Figure 9)
From Figure 6
Second Part
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