Texas Instruments HFDEMOKITII ユーザーズマニュアル

The S6350 reader accepts and sends data at RS232 levels, 57600 baud, 8 data bits, 1 start bit,
1 stop bit and no parity.  The data packet from the host to the reader is known as the request
and the reply from the reader to the host as the response. The host is always the primary station
and initiates all communication sequences.  These consist of request/response pairs where the
host waits for a response before continuing. The S6350 reader does not use the node address.

Field Name

SOF

Field Size 

1 byte

Field Value

01

hex

Purpose

Start of Frame

Field Name

Length

Field Size 

2 byte LSB first

Field Value

Packet dependent

Purpose

Describes the length of the whole packet including SOF

Field Name

Node Address

Field Size 

2 byte LSB first

Field Value

0000

hex

Purpose

Must be 0000

hex

 for upward compatibility

Field Name

Command flags

Field Size 

1 byte

Field Value

Varies by command

Purpose

Specifies the action to be taken by the reader

Field Name

Command

Field Size 

1 byte

Field Value

Varies by command

Purpose

Specifies the action to be taken by the reader

Field Name

Data

Field Size 

0 to xx bytes

Field Value

Command dependent

Purpose

Contains the parameters and data for the command

Field Name

BCC

Field Size 

2 bytes

Field Value

16 bit LRC of the preceding packet including the SOF

Purpose

Allows the reader to validate the correct reception of the request
packet