參數(shù)資料
型號: DS1993
英文描述: 1kb/4kb Memory iButton
中文描述: 1K位/4K位存儲器iButton®
文件頁數(shù): 7/17頁
文件大?。?/td> 223K
代理商: DS1993
DS1992/DS1993
Figure 6. MEMORY FUNCTIONS FLOW CHART
7of 7
Master TX Memory
Function Command
Y
DS199X sets Scratchpad
Offset = (T4:T0) and
Clears (PF, OF, AA)
DS199X sets (E4:E0)
= Scratchpad Offset
DS199X Increments
Scratchpad Offset
Bus Master TX
TA1 (T7:T0)
Bus Master TX
TA2 (T15:T8)
Master TX Data Byte
To Scratchpad Offset
Bus Master
TX Reset
N
0FH
Write
Scratchpad
N
Bus Master
TX Data
Y
N
PF = 1
N
Y
Bus Master
TX Reset
To Figure 6
Second Part
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)
Bus Master
TX Reset
DS199X Increments
Scratchpad Offset
Y
Master RX Data
Byte From
Scratchpad Offset
N
N
Scratch-
pad Offset =
11111b
Y
Y
Scratchpad
AAH
Bus Master
RX "1"s
From Figure 6
Second Part
OF = 1
Scratch-
pad Offset =
11111b
N
Partial
Byte Written
N
Y
Y
Y
DS199X TX
Presence Pulse
(See Figure 9)
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