LRIS2K-A1S/1GE STMicroelectronics, LRIS2K-A1S/1GE Datasheet - Page 92

• Manufacturer Part Number: LRIS2K-A1S/1GE
• Description: IC MEMORY TAG 64BIT UID ADH ANT
• Manufacturer: STMicroelectronics
• Series: LRIS2Kr

Specifications of LRIS2K-A1S/1GE

• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: ISO15693, ISO18000-3, 2048-bits
• Package / Case: 76mm x 45mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5534-2

Anticollision algorithm (Informative)
Appendix A
A.1
92/98
The following pseudocode describes how anticollision could be implemented on the VCD,
using recursivity.
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)
last stored collision
end poll_loop
main_cycle:
end_main_cycle
pop (mask, address)
mask = address & mask; generates new mask
mode = anticollision
send_Request (Request_cmd, mode, mask length, mask value)
for sub_address = 0 to (2^sub_address_size - 1)
if stack_not_empty ; if some collisions have been detected and
mask = null
address = null
push (mask, address)
poll_loop(sub_address_size)
pulse_next_pause
if no_collision_is_detected ; LRIS2K is inventoried
next sub_address
then
endif
then
else ; remember a collision was detected
endif
poll_loop (sub_address_size); recursively to process the
Anticollision algorithm (Informative)
store (LRIS2K_UID)
push(mask,address)
; send the request
; not yet processed, the function calls itself
Doc ID 13888 Rev 8
LRIS2K