SRTAG2KL
RF command sets
5.9.3
The SFGI which stands for the Start-up Frame Guard Time is the minimum time that the
reader shall wait after receiving the response of the SRTAG2KL.
PPS command & response(b)
PPS (Protocol and Parameter Selection) command and response are defined in ISO/IEC
14443-4, in the Protocol Activation of PICC Type A.
The PPS command allows to change the data rates of the ascending (RF host to
SRTAG2KL) and descending (SRTAG2KL to RF host) data rates. Usage of this command is
optional, SRTAG2KL only supports 106 Kb/s in both direction.
Name
Table 51. PPS command
INS (PPSS)
PPS0
- Byte field
0xDX
0x11
Bit field b7-b4
b3-b0
Instruction code
INS
DID
PPS1 is present
PPS1
RFU
Descending data rate (106 kb/s) = 0b00
Ascending data rate (106 kb/s) = 0b00
2 CRC bytes
0b0000
PPS1
1 byte
b3-b2
b1-b0
CRC
2 bytes
The ascending and descending data rates shall be coded as described in Table 52.
Value
Data rate
Table 52. Ascending and descending data rate coding
0b00
0b01
0b10
106 kbps
RFU
RFU
0b11
RFU
When the SRTAG2KL is able to change both data rates, it returns the following response.
The data rate of this response is 106 kbps; then, the SRTAG2KL changes the ascending
and descending data rates.
Table 53 gives the details sof the PPS response.
b. Not useful in case of SRTAG2KL which only support a Data Rate of 106 Kb/s in both direction.
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