3.6 GPO Mapping and Controller State Code
The following table describes all the relevant GPO mapping for the GPO pins of the
ATA8352 UWB device. Activate them by using register A21. All the other GPO
configurations are reserved; use them only for validation and device test functions. The
GPIO in the ATA8350 UWB device is renamed GPO in the ATA8352 UWB device.
| Mux | Description | GPO[4] | GPO[3] | GPO[2] | GPO[1] | GPO[0] |
|---|---|---|---|---|---|---|
| 5 | AGC LUT pointer | AGCp[0] | AGCp[3] | AGCp[2] | AGCp[1] | AGCp[4] |
| 21 | Shows PN31 error for the received data | Data bit valid | Sync Word Detected | Received data bit | PN31 Error | Expected Data bit |
| 25 | LE and Sync word detection | Data valid | Sync Detected | RXenable | LEvalid | LE stable |
| 27 | LE Tracking | LE_idx[4] | LE_idx[3] | LE_idx[2] | LE_idx[1] | LE_idx[0] |
| 31 | Controller state | Update data | State[3] | State[2] | State[1] | State[0] |
| 32 | Test fBB on MST_CLK pin | 0 | pll_sb_locked | 0 | 0 | xtal_enb |
| 33 | PR failing due to SSID error or bad correlation | SSID correct | Sync Detected | TRXstate[1] | TRXstate[0] | Corr Correct |
| 46 | RXFIFO | Nearly full | Sync Detected | IRQ_RXready | IRQ_PRready | Overflow |
| 47 | TXFIFO | TX enable | Nearly empty | IRQ_TXready | IRQ_VRready | IRQ_Timeout |
The following table lists the controller state codes for debugging on the GPO pins when using GPOMUX = 31 mode.
There are changes in the ATA8352 UWB device compared to the ATA8350 UWB device in the GPO
descriptions. For example, 1011/1100, which aligns to
the internal reference counter in the RXo Operating mode, is not available in the
ATA8350 UWB device.
| Operating Mode | GPO State Code | Description |
|---|---|---|
| POWER DOWN | 0000 | The IC is powered down |
| IDLE | 0000 | Power supply is ON. The SPI is ready to accept commands |
| RX | 0101
| Full RX mode, searching for preamble
(0101), sync word locked RX mode receiving data
(0110), and align to the internal reference
counters (1011/1100) |
| TX | 1101 | Transmitting mode for data communication |
| RXo | 0101
| Full RX mode, searching for preamble
(0101), sync word locked RX mode receiving data
(0110) +Align to the internal reference
counters ( Clear RX mode (1010); RXo
mode enable ( Align to the internal
reference counters
( |
| TXo | 1101 | Transmitting mode for data communication and postamble |