ZHCS363L August 2011 – March 2017 TRF7970A
PRODUCTION DATA.
The RX-wait-time timer is controlled by the value in the RX wait time register 0x08. This timer defines the time after the end of the transmit operation in which the receive decoders are not active (held in reset state). This prevents incorrect detections resulting from transients following the transmit operation. The value of the RX wait time register defines this time in increments of 9.44 µs. This register is preset at every write to ISO Control register 0x01 according to the minimum tag response time defined by each standard.
Table 6-35 describes the RX Wait Time register.
Function: Defines the time after TX EOF when the RX input is disregarded for example, to block out electromagnetic disturbance generated by the responding card. | |||
Default: 0x1F at POR = H or EN = L and at each write toISOcontrolregister. | |||
Bit | Name | Function | Description |
B7 | Rxw7 | RX wait time | Defines the time after the TX EOF during which the RX input is ignored. Time starts from the end of TX EOF. RX wait range is 9.44 µs to 2407 µs (1 to 255), Step size 9.44 µs. The following default timings are preset by the ISO Control register (0x01): 9.44 µs → FeliCa 66 µs → ISO/IEC 14443 A and B 180 µs → Reserved 293 µs → ISO/IEC 15693 (TI Tag-It HF-I) |
B6 | Rxw6 | ||
B5 | Rxw5 | ||
B4 | Rxw4 | ||
B3 | Rxw3 | ||
B2 | Rxw2 | ||
B1 | Rxw1 | ||
B1 | Rxw0 |