SNAU298 October 2023
Table 3-1 describes the default jumper configuration for the EVM to power the device from an on-board 3.3-V LDO with USB supply option. Configure the EVM as specified in the table for initial bring up. The EVM can also be configured to external power supply by changing the position of jumper JP17 as described in Table 3-1.
Category | Reference Designator | Position | Description |
---|---|---|---|
Power | J5 | 1-2 | Connect USB or external supply to VDDA of chip. |
J6 | 1-2 | Connect USB or external supply to output bank and digital supply of the chip (VDD). | |
J7 | 1-2 | Connect USB or external supply to IO pins on board (VDD_IO). | |
JP17 | 2-3 | Choose between USB power supply and external. Current configuration is for USB option. To change to external supply, change jumper position to 1-2. | |
Output Enable Control Pins | JP1, JP5, JP9, JP13, JP18 | 2-3 | Pull down to GND to enable output (OE#0, OE#4, OE#8, OE#12, OE#16) with pin control option. |
JP2, JP3, JP4, JP6, JP7, JP8, JP10, JP11, JP11, J12, JP14, JP15, JP16, JP19, JP20, JP21 | - | Not populated on the EVM. If additional outputs are needed, these jumpers need to be soldered onto the EVM, as well as their respective output edge SMA headers. | |
SMBus Address Control Pins | JP25, JP26 | - | Refer to Table 3-7 or selecting SMBus address. |
Digital Pins | JP23, JP24 | 1-2 | TCA Reset and CLKPWRGD_PD# pulled high. |
JP22 | 1-3 | SBEN pin = GND | |
J49 | - | SN74LVC125 buffer enable control pin. Default pull down to GND. |