DS1977-F5 Просмотр технического описания (PDF) - Dallas Semiconductor -> Maxim Integrated

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Компоненты Описание

производитель

DS1977-F5

32KB EEPROM iButton

Dallas Semiconductor -> Maxim Integrated 

Figure 5-2. Memory Function Flow Chart, Part 2

99h

N

Copy Scrpad.

[w/PW]

Y

Master TX

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

Master TX

E/S Byte

Master TX

64-Bits [Password]

Master Activates

Strong Pull-up

N

Read -A.

Y

Password?

Save to Read

Password Holding

Register

Y

More data

in SP?

N

Save to Full-A.

Password Holding

Register

N

Password

Accepted?

Y

N

Authorization

Code Match?

Y

AA = 1

Y

Address of

Password?

N

DS1977 Copies Scratchpad

Data or Data from Password

Holding Register (if Password

Address) to Memory

Power

Y

Fail?

N

DS1977 TX "0"

Master

Y

TX Reset?

N

DS1977 TX "1"

N

Master

TX Reset?

Y

Authorization

Code

Master RX "1"s

Master

N

TX Reset?

Y

Page 9

1/31/03

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