DS2432X Dallas Semiconducotr, DS2432X Datasheet - Page 8

• Manufacturer Part Number: DS2432X
• Description: 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine
• Manufacturer: Dallas Semiconducotr

PRELIMINARY
Memory and SHA Functions Flow Chart Figure 7
Bus Master
TX Reset ?
RX “1”s
Master
Y
N
N
TA1 (T7:T0), TA2 (T15:T8)
Bus Master TX Memory
Function Command
Bus Master TX
Write Scratch-
Address
< 90h ?
pad ?
0Fh
Bus Master
Byte Counter
RX “1”s
Increments
Y
DS2432
Flow Chart (Figure 9)
To ROM Functions
8 of 30
N
Y
N
DS2432 sets Scratchpad
N
Data Bytes as they were
of Command, Address,
sent by the bus master
Master TX Data Byte
Sets T2:T0 = 0, 0, 0,
Sets E2:E0 = 1, 1, 1
DS2432 TX CRC16
Byte Counter = 0,
Clears PF, AA,
From ROM Functions
To Scratchpad
Flow Chart (Figure 9)
Byte Counter
TX Reset ?
TX Reset ?
Master
Master
= 7 ?
N
Y
Y
Y
Partial
Byte ?
PF = 1
From Figure 7
To Figure 7
Y
2
2
nd
nd
Part
Part
N
DS2432