SLOS743M August 2011 – March 2020 TRF7970A
PRODUCTION DATA.
Table 6-48 describes the Special Functions register at address 0x10.
Function: User configurable options for ISO/IEC 14443 A specific operations | |||
Bit | Name | Function | Description |
B7 | Reserved | Reserved | |
B6 | Reserved | Reserved | |
B5 | par43 | Disables parity checking for ISO/IEC 14443 A | |
B4 | next_slot_37us | 0 = 18.88 µs
1 = 37.77 µs |
Sets the time grid for next slot command in ISO/IEC 15693 |
B3 | Sp_dir_mode | Bit stream transmit for MIFARE at 106 kbps | Enables direct mode for transmitting ISO/IEC 14443 A data, bypassing the FIFO and feeding the data bit stream directly onto the encoder. |
B2 | 4_bit_RX | 0 = normal receive
1 = 4-bit receive |
Enable 4-bit replay for example, ACK, NACK used by some cards; for example, MIFARE Ultralight |
B1 | 14_anticoll | 0 = anticollision framing (0x93, 0x95, 0x97)
1 = normal framing (no broken bytes) |
Disable anticollision frames for ISO/IEC 14443 A (this bit should be set to 1 after anticollision is finished) |
B0 | col_7_6 | 0 = 7 subcarrier pulses
1 = 6 subcarrier pulses |
Selects the number of subcarrier pulses that trigger collision error in ISO/IEC 14443 A at 106 kbps |