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LRIS2K Datenblatt(PDF) 97 Page - STMicroelectronics

Teilenummer LRIS2K
Bauteilbeschribung  2048-bit EEPROM tag IC at 13.56 MHz, with 64-bit UID and Password, ISO15693 and ISO18000-3 Mode 1 compliant
PDF  102 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LRIS2K Datenblatt(HTML) 97 Page - STMicroelectronics

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LRIS2K
Anticollision algorithm (Informative)
97/102
Appendix A
Anticollision algorithm (Informative)
The following pseudocode describes how anticollision could be implemented on the VCD,
using recursivity.
A.1
Algorithm for pulsed slots
function push (mask, address); pushes on private stack
function pop (mask, address); pops from private stack
function pulse_next_pause; generates a power pulse
function store(LRIS2K_UID); stores LRIS2K_UID
function poll_loop (sub_address_size as integer)
pop (mask, address)
mask = address & mask; generates new mask
; send the request
mode = anticollision
send_Request (Request_cmd, mode, mask length, mask value)
for sub_address = 0 to (2^sub_address_size - 1)
pulse_next_pause
if no_collision_is_detected ; LRIS2K is inventoried
then
store (LRIS2K_UID)
else ; remember a collision was detected
push(mask,address)
endif
next sub_address
if stack_not_empty ; if some collisions have been detected and
then
; not yet processed, the function calls itself
poll_loop (sub_address_size); recursively to process the
last stored collision
endif
end poll_loop
main_cycle:
mask = null
address = null
push (mask, address)
poll_loop(sub_address_size)
end_main_cycle



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