Rainbow-electronics DS2432 Manuale Utente Scaricare il pdf (Pagina 9)

PRELIMINARY DS2432

9 of 30

Memory and SHA Functions Flow Chart (continued) Figure 7

AAh

Read Scratch-

Pad ?

DS2432 sets Scratchpad

B

y

te Counter = 0

Bus Master RX

TA1 (T7:T0), TA2 (T15:T8)

and E/S B

y

te

Bus Master RX

Data B

y

te from Scratch

p

ad

Bus Master RX CRC16

of Command, Address,

E/S Byte, Data Bytes as

sent b

y

the DS2432

Y

Bus Master

RX “1”s

Master

TX Reset ?

Y

N

Master

TX Reset ?

DS2432

Increments

B

y

te 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.

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