NXP Semiconductors K32 L2A Series, Reference Manual, Page: 497 / 1379

EMVSIMx_TX_THD field descriptions (continued)
Field Description
be set. Setting of TNTE causes the remaining transmissions queued in the transmit FIFO to be aborted
and no more transmissions to occur until software clears TNTE. To trigger TNTE, a given byte being
transmitted must reach the TNCK_THD threshold itself. Transmit NACKs accumulated on one byte are not
carried over to the next.
0 TNTE will never be set; retransmission after NACK reception is disabled.
1 TNTE will be set after 1 nack is received; 0 retransmissions occurs.
2 TNTE will be set after 2 nacks are received; at most 1 retransmission occurs.
3 TNTE will be set after 3 nacks are received; at most 2 retransmissions occurs.
. . . . . .
N TNTE will be set after N nacks are received; at most (N - 1) retransmissions occurs.
. . . . . . . .
15 TNTE will be set after 15 nacks are received; at most 14 retransmissions occurs.
7–4
Reserved
This field is reserved.
This read-only field is reserved and always has the value 0.
TDT Transmitter Data Threshold Value
Used to set the threshold value for the Transmit FIFO at which the TDTF bit in the TX_STATUS register
will be set. When the number of bytes in the Transmit FIFO is less than or equal to TDT[3:0], TDTF will be
set.
Chapter 21 Smart Card Interface Module (EMV SIM)
K32 L2A Reference Manual, Rev. 2, 01/2020
NXP Semiconductors 497