Datasheet

DS1921H/Z
20 of 45
MEMORY/CONTROL FUNCTION FLOW CHART Figure 10-3
A5H
Read Mem.
w/CRC
DS1921 sets Memory
Address = (T15:T0)
Master RX Data Byte
from Memory Address
End of
Memory?
Y
Master
TX Reset?
CRC OK?
DS1921 Incre-
ments Address
Counter
End of Page?
Master RX CRC16 of
Command, Address, Data
(1
st
Pass); CRC16 of Data
(Subsequent Passes)
Master TX
Reset
N
Y
N
Y
Y
N
Decision made
by DS1921
Decision made
by Master
Master TX
TA1 (T7:T0), TA2 (T15:T8)
DS1921 sets
EMCLR = 0
From Figure 10
2
nd
Part
To Figure 10
2
nd
Part
To Figure 10
4
th
Part
From Figure 10
4
th
Part
N
N
Y
Master RX
00 Byte