Rainbow Electronics DS2432 - Manual (Page 9)

PRELIMINARY DS2432
9 of 30
Memory and SHA Functions Flow Chart (continued) Figure 7
AAh
Read Scratch-
Pad ?
DS2432 sets Scratchpad
Byte Counter = 0
Bus Master RX
TA1 (T7:T0), TA2 (T15:T8)
and E/S Byte
Bus Master RX
Data Byte from Scratchpad
Bus Master RX CRC16
of Command, Address,
E/S Byte, Data Bytes as
sent by the DS2432
Y
Bus Master
RX “1”s
Master
TX Reset ?
Y
N
Master
TX Reset ?
DS2432
Increments
Byte Counter
Byte Counter
= 7 ?
Y
Y
N
N
N
From Figure 7
1
st
Part
To Figure 7
1
st
Part
To Figure 7
3
rd
Part
From Figure 7
3
rd
Part
Note:
For write protected data
memory or register page
locations, the master will
read either AAh or 55h. In
EPROM mode the master
will receive scratchpad data
logically ANDed by the
current data of the targeted
memory address.