Datasheet

DS28E04-100: 4096-Bit 1-Wire Addressable EEPROM with PIO
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PIO ACCESS PULSE EXAMPLE
Generate a pulse on PIO1. Both PIOs are pulled high to V
CC
by a resistor. POL = 1. V
CC
power is present.
With only a single DS28E04-100
connected to the bus master, the communication looks like this:
MASTER MODE
DATA (LSB FIRST)
COMMENTS
TX
(Reset)
Reset pulse
RX
(Presence)
Presence pulse
TX
CCh
Issue “Skip ROM” command
TX
A5h
Issue “PIO Access Pulse” command
TX
FEh
Write PIO selection mask
TX
01h
Write inverted PIO selection mask
RX
AAh
Read confirmation byte
RX
1111110Xb
Read PIO pin status
1)
TX
(Reset)
Reset pulse
RX
(Presence)
Presence pulse
1)
The "X" indicates the state of PIO0, which is not defined in this example.
PACKAGE INFORMATION
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages.
Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different
suffix character, but the drawing pertains to the package regardless of RoHS status.
PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
16 SO S16+1 21-0041 90-0097