Rainbow Electronics DS2406 - Manual (Page 10)

DS2406
10 of 31
Memory Function Flow Chart Figure 7
Spare
Vertical
F0h
Read Memory
?
TA1(T7:T0), TA2 (T15:T8)
Bus Master TX
Address = (T15:T0)
DS2406 sets Memory
A5h
Extended Rd.
Memory
?
R
S
Bus Master TX Memory
Function Command
To Figure 7
2nd Part
Y Y
N N
Master
TX Reset ?
Y
increments
DS2406
Address
Counter
End of
Data Mem.
?
Master
TX Reset ?
Y
N
N
Y
N
Command, Address, Data
Bus Master RX CRC16 of
Y
N
Bus Master
RX "1"s
Master
TX Reset ?
TA1(T7:T0), TA2 (T15:T8)
Bus Master TX
Address = (T15:T0)
DS2406 sets Memory
Redirection Byte
Bus Master RX
Address, Redir. Byte (1st pass)
Bus Master RX CRC16 of Command,
CRC16 of Redir. Byte (subs. passes)
CRC
Correct ?
Master
TX Reset ?
End
of Page ?
Preceding Page of Data
Bus Master RX CRC16 of
CRC
Correct ?
End of
Data Mem.
?
from Data Memory
Bus Master RX Data
from Data Memory
Bus Master RX Data
Y
N
Bus Master
RX "1"s
Master
TX Reset ?
increments
DS2406
Address
Counter
increments
DS2406
Address
Counter
Reset Pulse
Bus Master TX
Reset Pulse
Bus Master TX
Presence Pulse
DS2406 TX
N
Y
N
Y
N
Y
N
Y
Legend:
Decision made
by Bus Master
Decision made
by DS2406
Y
N