ST95HF datasheet(28/93 Pages) STMICROELECTRONICS

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Commands

ST95HF

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DocID025630 Rev 4

Table 17 gives examples of communication between the ST95HF and a contactless tag.

The ST95HF receives a SendRecv command (>>> 0x04...) from the host and returns its

response to the host (<<< 0x80...). Table 17 provides more details on the ST95HF

response format.

ST95HF to

Host

0x88

Error code

<<<0x8800

Invalid SOF

0x00

Length of data

ST95HF to

Host

0x89

Error code

<<<0x8900

Receive buffer overflow

(too many bytes received)

0x00

Length of data

ST95HF to

Host

0x8A

Error code

<<<0x8A00

Framing error (start bit = 0,

stop bit = 1)

0x00

Length of data

ST95HF to

Host

0x8B

Error code

<<<0x8B00

EGT time out (for ISO/IEC

14443-B)

0x00

Length of data

ST95HF to

Host

0x8C

Error code

<<<0x8C00

Invalid length. Used in NFC

Forum Tag Type 3, when field Length <

0x00

Length of data

ST95HF to

Host

0x8D

Error code

<<<0x8D00

CRC error (Used in NFC

Forum Tag Type 3 protocol)

0x00

Length of data

ST95HF to

Host

0x8E

Error code

<<<0x8E00

Reception lost without EOF

received

0x00

Length of data

1. See Table 17 for details.

Table 17. List of <Data> Send values for the SENDRECV command for different

protocols

Protocol

Explanation

Command example

Comments

ISO/IEC

15693

Send example

022000

Example of an Inventory command

using different protocol configuration:

Uplink: 100% ASK, 1/4 coding

Downlink: High data rate, Single sub-

carrier

>>> 0x0403260100 (Inventory - 1 slot)

<<< 0x800D0000CDE0406CD62902

E0057900

If length of data is ‘0’, only the EOF will

be sent. This can be used for an anti-

collision procedure.

Command code

Length of entire data field

Data

Table 16. SENDRECV command description (continued)

Direction

Data

Comments

Example

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