ST25R3910 datasheet(46/65 Pages) STMICROELECTRONICS

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ST25R3910

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DocID029768 Rev 2

1.3.12

Number of Transmitted Bytes Register 0

Address: 0Bh

Type: RW

1.3.13

Number of Transmitted Bytes Register 1

Address: 0Ch

Type: RW

Table 19. Number of Transmitted Bytes Register 0(1)

Bit

Name

Default

Function

Comments

7ntx1

Number of bytes to be transmitted in one

command (LSB bits)

Maximum supported number of bytes is 1023

6ntx0

5nbtx2

Number of bits in the split byte,

000 means that the split byte is actually a

complete byte

Applicable only to ISO-14443A bit oriented

anticollision frame in case last byte is a split

byte

4nbtx1

3nbtx0

Not used

frm4(2)

1: 4bit response frame

Has to be set to 1 when 4bit response frame

is expected (Mifare Ultralight)

0antcl(2)

1: ISO-14443 anticollision frame

Has to be set to 1 when ISO-14443A

bit-oriented anticollision frame is sent

1. Default setting takes place at power-up, after Set Default and after Clear commands.

2. Cleared after transmission.

Table 20. Number of Transmitted Bytes Register 1(1)

Bit

Name

Default

Function

Comments

7ntx9

Number of bytes to be transmitted in one

command (MSB bits)

Maximum supported number of bytes is 1023

6ntx8

5ntx7

4ntx6

3ntx5

2ntx4

1ntx3

0ntx2

1. Default setting takes place at power-up, after Set Default and after Clear commands.

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