HCS412T datasheet(23/44 Pages) MICROCHIP

23 / 44 page

Preliminary

DS41099C-page 23

HCS412

TABLE 4-5:

LIST OF WRITE COMMANDS

FIGURE 4-5:

WRITE TO SERIAL NUMBER OR CONFIGURATION

FIGURE 4-6:

WRITE TO USER AREA

Command

Description

Expected data In

Response if Write is Successful

01001

Write Configuration word

28-bit Transport code; 16-Bit

configuration word

Write Acknowledge pulse

01010

Write low serial number

28-bit Transport code; Least Significant

16 bits of the serial number (SER0)

Write Acknowledge pulse

01011

Write high serial number

28-bit Transport code; Most Significant

16 bits of the serial number (SER1)

Write Acknowledge pulse

01100

Write user EEPROM 0

16 Bit User EEPROM USR0

Write Acknowledge pulse

01101

Write user EEPROM 1

16 Bit User EEPROM USR1

Write Acknowledge pulse

01110

Write user EEPROM 2

16 Bit User EEPROM USR2

Write Acknowledge pulse

01111

Write user EEPROM 3

16 Bit User EEPROM USR3

Write Acknowledge pulse

Activate

Field

ACK

Delay to

Command

Delay to

TCODE

Transport

Write ACK

Delay before Write

ACK

28-bit

Delay to

Data

Code

16 bits Data

Transport

Code

28-bit

TWR

Command

TOTD

Write Delay

Communication from reader to HCS412

Communication from HCS412 to reader

Start

2 LFTE

Start

2 LFTE

Start

2 LFTE

ACK

TTTD

TPU

TATO

Data Bits

Command

ACK

Write Delay

TWR

ACK

Communication from reader to HCS412

Communication from HCS412 to reader

Start

2 LFTE

Start

2 LFTE

TOTD

TPU

TATO

Activate

Field

ACK

Delay to

Command

Delay to

Data

16 bits Data

Write ACK

Delay before Write

ACK

Data Bits

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