HCS473-I/SLROM(2013) View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

HCS473-I/SLROM
(Rev.:2013)

KEELOQ® 3-Axis Transcoder

Microchip Technology 

HCS473

FIGURE 3-23:

RFEN BEHAVIOR DURING LF COMMUNICATION

Wake-up Sequence

TSF

TCMD

Command

Inductive In (LC)

ASK

RF (DATA)

PLL (RFEN)

FSK

RF (DATA)

PLL (RFEN)

1 LFTE

1 LFTE

TCMD

Transponder Select Sequence

12-Bit VID TID=0 TID=1 TID=2 TID=3

Inductive In (LC)

ASK

RF (DATA)

PLL (RFEN)

FSK

RF (DATA)

PLL (RFEN)

Next

Command

1 LFTE

ACK Response Sequences Concluding with CRC

- Present Transport Code

- Write

- Anticollision Off

CRC

Inductive In (LC)

ASK

RF (DATA)

PLL (RFEN)

FSK

RF (DATA)

PLL (RFEN)

Response

Time

Data Response Sequences Concluding with CRC

- IFF

- Read

- Request Hopping Code CRC

Inductive In (LC)

ASK

RF (DATA)

PLL (RFEN)

FSK

RF (DATA)

PLL (RFEN)

Response

Time

Command

1 LFTE

Command

DS40035D-page 34

Preliminary

 2000-2013 Microchip Technology Inc.

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