ST95HF datasheet(42/93 Pages) STMICROELECTRONICS

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Commands

ST95HF

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DocID025630 Rev 4

An example of a basic Idle command used during the Tag Detection Calibration process:

>>>0x07 0E 03 A1 00 F8 01 18 00 20 60 60 00 xx 3F 01

where xx is the DacDataH value.

An example of a tag detection sequence is provided in Example of tag detection command

using results of tag detection calibration on page 68.

5.10

Read Register (RdReg) command (0x08) description

This command is used to read the Wakeup register.

Note:

The Management of the Analog Register Configuration register (ACC_A or ARC_B) is

described in Section 5.11: Write Register (WrReg) command (0x09) description.

Table 28. RDREG command description

Direction

Data

Comments

Example

Host to

ST95HF

0x08

Command code

Ex 1. >>>0x0803690100

Reads the ACC_A or ARC_B register. (1)

1. This command must be preceded by the setting of the ACC_A register index (0x0903680004) or by

setting the ARC_B register index (0x0903680001).

0x03

Length of data

0x62

or 0x69 Register address

0x01

0x00

ST Reserved

ST95HF to

Host

0x00

Result code

<<<0x000101

Wake-up by Timeout (Ex. 1)

<<<0x000102

Wake-up by Tag Detect (Ex.

<<<0x000113

Depth = 1, Gain = 3 (Ex. 2)

<<< 0x000127

(ACC_A register)

Default value for Demodulator Sensitivity

and Load Modulation. See Write Register

description for more information on received

data.

<<< 0x000113

(ARC_B register)

Depth = 1, Gain = 3 (Ex. 2). See Write

received data.

<Len>

Length of data (=

RegCount)

ST95HF to

Host

0x82

Error code

<<<0x8200

Invalid command length

0x00

Length of data

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