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M24LR64-R-MB6T/2 Datasheet(PDF) 121 Page - STMicroelectronics

Part # M24LR64-R-MB6T/2
Description  64 Kbit EEPROM with password protection & dual interface: 400kHz I짼C serial bus & ISO 18000-3 mode 1 RF protocol at 13.56MHz
PDF  126 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M24LR64-R-MB6T/2 Datasheet(HTML) 121 Page - STMicroelectronics

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M24LR64-R
Anticollision algorithm (informative)
Doc ID 15170 Rev 8
121/126
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(M24LR64-R_UID); stores M24LR64-R_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 ; M24LR64-R is inventoried
then
store (M24LR64-R_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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