JAJSPK6B December 2015 – January 2023 ADS54J66
PRODUCTION DATA
The following steps are recommended as the power-up sequence with the ADS54J66 in DDC mode 8 (no decimation) with LMFS = 4421 (shown in Table 8-1).
STEP | DESCRIPTION | REGISTER ADDRESS | REGISTER DATA | COMMENT |
---|---|---|---|---|
1 | Power up the IOVDD 1.15-V supply before the 1.9-V supply. All other supplies (AVDD 1.9-V and AVDD 3-V supply) can be supplied in any order. | — | — | — |
2 | Pulse a hardware reset (low to high to low) on pin 48. | — | — | — |
Alternatively, the device can be reset with an analog reset and a digital reset. | 0000h 4004h 4003h 4002h 4001h 60F7h 60F7h 70F7h 70F7h | 81h 68h 00h 00h 00h 01h 00h 01h 00h | — | |
3 | Set the input clock divider. | 0011h 0053h 0039h 0059h | 80h 80h C0h 20h | Select the master page in the analog bank. Set the clock divider to divide-by-2. Set the ALWAYS WRITE 1 bit for all channels. Set the ALWAYS WRITE 1 bit for all channels. |
4 | Reset the interleaving correction engine in register 6800h of the main digital page of the JESD bank. (Register access is already set to page 6800h in step 2.) | 6000h 6000h 7000h 7000h | 01h 00h 01h 00h | Resets the interleaving engine for channel A, B (because the device is in broadcast mode). Resets the interleaving engine for channel C, D (because the device is in broadcast mode). |
5 | Set DDC mode 8 for all channels (no decimation, 14-bit, 500-MSPS data output). | 4004h 4003h | 61h 41h | Select the decimation filter page of the JESD bank. |
6000h 7000h | 08h 08h | Select DDC mode 8 for channel A, B. Select DDC mode 8 for channel C, D. | ||
6001h 7001h | 04h 04h | Set the ALWAYS WRITE 1 bit for channel A, B. Set the ALWAYS WRITE 1 bit for channel C, D. | ||
6 | Default registers for the analog page of the JESD bank. | 4003h 4004h | 00h 6Ah | Select the analog page in the JESD bank. |
6016h 7016h | 02h 02h | PLL mode 40x for channel A, B. PLL mode 40x for channel C, D. | ||
7 | Default registers for the digital page of the JESD bank. | 4003h 4004h | 00h 69h | Select the digital page in the JESD bank. |
6000h 6001h 7000h 7001h | 20h 01h 20h 01h | Enable JESD MODE control for channel A, B. Set JESD MODE to 20x mode for LMFS = 4421. Enable JESD MODE control for channel C, D. Set JESD MODE to 20x mode for LMFS = 4421. | ||
6000h 6006h 7000h 7006h | 80h 0Fh 80h 0Fh | Set CTRL K for channel A, B. Set K to 16. Set CTRL K for channel C, D. Set K to 16. | ||
8 | Enable a single SYNCb input (on the SYNCbAB pin). | 4005h 7001h | 01h 20h | Disable broadcast mode. Use SYNCbABP, SYNCbABM to issue a SYNC request for all four channels. |
9 | Pulse SYNCbAB (pins 55 and 56) from high to low. | — | — | K28.5 characters are transmitted by all four channels (CGS phase). |
10 | Pulse SYNCbAB (pins 55 and 56) from low to high. | — | — | The ILA sequence begins and lasts for four multiframes. The device transmits ADC data after the ILA sequence ends. |