DS28E04-100 Maxim, DS28E04-100 Datasheet - Page 14

• Manufacturer Part Number: DS28E04-100
• Description: The DS28E04-100 is a 4096-bit, 1-Wire® EEPROM chip with seven address inputs
• Manufacturer: Maxim

Figure 9-1. Memory/Control Function Flow Chart
Bus Master
RX “1”s
Scratchpad
Increments
DS28E04
Offset
TA1 (T7:T0), TA2 (T15:T8)
Bus Master TX EEPROM
N
DS28E04 sets Scratchpad
N
Bus Master TX Memory
Data Bytes as they were
of Command, Address,
sent by the bus master
Array Target Address
To Scratchpad Offset
DS28E04 TX CRC16
Function Command
Master TX Data Byte
Offset = (T4:T0),
Scrpad. Offset
Write Scratch-
Clears PF, AA
TX Reset ?
TX Reset ?
= 11111b?
Master
Master
pad ?
0Fh
N
Y
Y
Y
Flow Chart (Figure 14)
To ROM Functions
14 of 37
N
Y
Applies only if the page is not write
protected or in EPROM mode. If write-
protected, then the DS28E04 copies the
data byte from the target address into
the scratchpad. If in EPROM mode,
then the DS28E04 stores the bitwise
logical AND of the transmitted byte and
the data byte from the targeted address
into the scratchpad.
Flow Chart (Figure 14)
Partial
Byte ?
PF = 1
From ROM Functions
Y
N
From Figure 9
To Figure 9
2
2
nd
nd
Part
Part