AT24RF08-EK Atmel, AT24RF08-EK Datasheet - Page 10

• Manufacturer Part Number: AT24RF08-EK
• Description: KIT EVAL FOR AT24RF08CN-10SC
• Manufacturer: Atmel
• Type: Dual Access EEPROMr

Specifications of AT24RF08-EK

• Contents: Atmel Asset ID Kit CDROM, 4 RFID Tags, Reader with Serial Port Cable and 9V Power Supply
• For Use With/related Products: AT24RF08C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Quiet
Similar to “infinite” except that only the global commands
are honored. If the operation of the system includes only
multi tag ID transmission along with the use of the global
set tamper command, it is useful to note that the global set
tamper command should be sent to every device before the
Disable Chip/Set Quiet command is sent to the selected
tag. Since tags in the init state transition to unselected
with a global command, the Disable Chip/Set Quiet will
automatically bring them back to init to complete the multi-
tag discrimination procedure. In some cases, it is possible
for multiple tags to be selected inadvertently, or for tags to
be in a state that the reader does not expect. Normally, a
Delay Length for Commands
Note:
10
Command
Set Block Address Latch
Set Page Address Latch
Write Page P in Block BL
Read Page P in Block BL
Write Word W, Page PL
Read Word W, Page PL
Global Write Word W
Set EEPROM Tamper Latch
Global Set Tamper Latch
Disable Chip/Set QUIET bit
Global Reset QUIET bit
1. After the data for a write is sent to the device, there will be a delay of T
reader and then the ‘three bit’ window will occur. During this delay, the device ignores all data sent to it.
AT24RF08C
Selected
Long
Long
Three
Three
Three
Three
Long
Long
Long
Quiet
Random
(1)
(1)
(1)
Global Reset Quiet command may be issued to reset all
tags, but this will be ignored by a device while it is
transmitting its ID. Issuing this command three times in
succession will ensure that any rogue chips go back to the
init state.
The table below combines the two lists above to show what
delay is used, depending on the current state of the chip
and the command that is issued by the reader. In the State
Transition Diagram, shown on the next page, the same
information is shown graphically in a state diagram for the
chip.
Unselected
Infinite
Infinite
Infinite
Infinite
Infinite
Infinite
Infinite
Infinite
Infinite
Random
Random
WD
or T
TWD
. The written data will be read back to the
Quiet
Quiet
Quiet
Quiet
Quiet
Quiet
Quiet
Quiet
Quiet
Quiet
Quiet
Random