User's Manual

SDI011 REFERENCE MANUAL 52
6.5.13. READER_ CNTLESS_DISABLE_PPS
By default SDI011 does automatic PPS – i.e. it switches the RF communication speed to the
highest possible supported by the card.
This escape command can be used to switch ON/OFF automatic PPS. When automatic PPS is
OFF, then 106Kbps only is available.
The input buffer is
Byte #
Value
Description
B0
0x99
Escape command code
B1
0x01
Disable Auto-PPS
0x00
Enable Auto-PPS
The output buffer is
Output buffer
NULL
6.5.14. READER_SWITCH_RF_ON_OFF
This escape command can be used to switch the RF field ON or OFF when a Contact smart
card is inserted into the reader.
By default, the RF field is always in the ON state and when any contact smart card is inserted
in the reader, the RF field is turned OFF.
The input buffer shall contain 2 bytes
Byte #
Value
Description
B0
0x9C
Escape command code
B1
0x00
Switch RF Field OFF when contact card
is present in the reader
0x01
Switch RF Field ON when contact card
is present in the reader
0xFF
Get current field state when Contact
smart card is present in the reader
After the RF is turned off, to turn the RF ON again, card connect shall be done in direct mode.