ZHCS762F December 2011 – May 2017 TRF7963A
PRODUCTION DATA.
Table 6-23 describes the bit fields of the RX Wait Time register. This register 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 Value: 0x1F, set at POR = H or EN = L and at each write to the ISO Control register
The RX wait time timer is controlled by the value in the RX Wait Time register. 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 according to the minimum tag response time defined by each standard.
| BIT NO. | BIT NAME | FUNCTION | DESCRIPTION |
|---|---|---|---|
| B7 | Rxw7 | RX wait time. B7 is the MSB. | 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 is: 9.44 µs. The following default timings are preset by the ISO Control register (0x01): |
| B6 | Rxw6 | ||
| B5 | Rxw5 | ||
| B4 | Rxw4 | ||
| B3 | Rxw3 | ||
| B2 | Rxw2 | ||
| B1 | Rxw1 | ||
| B1 | Rxw0 |