ZHCS762F December 2011 – May 2017 TRF7963A
PRODUCTION DATA.
Table 6-22 describes the bit fields of the RX No Response Wait Time register. This register defines the time when no response interrupt is sent.
Default Value: 0x0E, set at POR = H or EN = L and at each write to ISO Control register
The RX no response timer is controlled by the RX No Response Wait Time register. This timer measures the time from the start of slot in the anticollision sequence until the start of tag response. If there is no tag response in the defined time, an interrupt request is sent and a flag is set in IRQ Status Control register (0x0C). This enables the external controller to be relieved of the task of detecting empty slots. The wait time is stored in the register in increments of 37.76 µs. This register is also preset, automatically, for every new protocol selection.
| BIT NO. | BIT NAME | FUNCTION | DESCRIPTION |
|---|---|---|---|
| B7 | NoResp7 | No response. B7 is the MSB. | Defines the time when the noresponseinterrupt is sent. Timing starts from the end of TX EOF. RX no response wait range is 37.76 µs to 9628 µs (1 to 255). Step size is 37.76 µs. The following default timings are preset by the ISO Control register (0x01): |
| B6 | NoResp6 | ||
| B5 | NoResp5 | ||
| B4 | NoResp4 | ||
| B3 | NoResp3 | ||
| B2 | NoResp2 | ||
| B1 | NoResp1 | ||
| B0 | NoResp0 |