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MBa53 DIP switch settings
Boot Device Selection (S2 & S3)
To select the desired boot medium set the DIP switches S2 and S3 accordingly.
| BOOT_MODE | S5-1 | S5-2 |
|---|---|---|
| Boot from eFuses | 1 | 0 |
| Serial Downloader | 1 | 1 |
| Internal Boot | 0 | 0 |
The following boot modes of the i.MX53 can be selected by the DIP switches S2 and S3 on the MBa53.
SD card
 |  |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DIP | S2-1 | S2-2 | S2-3 | S2-4 | S2-5 | S2-6 | S2-7 | S2-8 | S3-1 | S3-2 | S3-3 | S3-4 | S3-5 | S3-6 | S3-7 | S3-8 | ||
| ON | • | • | • | |||||||||||||||
| OFF | • | • | • | • | • | • | • | • | • | • | • | • | • | |||||
On-board eMMC
 |  |
|||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DIP | S2-1 | S2-2 | S2-3 | S2-4 | S2-5 | S2-6 | S2-7 | S2-8 | S3-1 | S3-2 | S3-3 | S3-4 | S3-5 | S3-6 | S3-7 | S3-8 | ||
| ON | • | • | • | • | ||||||||||||||
| OFF | • | • | • | • | • | • | • | • | • | • | • | • | ||||||
Configuration DIP switch S2
| DIP | OFF | ON |
|---|---|---|
| S2-1 | ARM Frequency 800 MHz | ARM Frequency 400 MHz |
| S2-2 | MMU/Cache is disabled by ROM during the boot | MMU/Cache is enabled by ROM during the boot |
| S2-3 | 200 MHz AXI / 400 MHz DDR | 166 MHz AXI / 333 MHz DDR |
| S2-4 | 19,2, 24, 26, 27 MHz Auto Detection | OSC Frequency 24 MHz |
CAN configuration (S10)
DIP switch S1 is used to configure the CAN interfaces CAN1 and CAN2.
Termination
| DIP | OFF (default) | ON |
|---|---|---|
| S10-1 | CAN1 not terminated | CAN1 terminated (120Ω) |
| S10-2 | CAN2 not terminated | CAN2 terminated (120Ω) |
RS485 configuration (S4)
DIP switch S4 is used to configure the RS485 interface.
Termination
| DIP | OFF (default) | ON |
|---|---|---|
| S4-1 | RS485 RxD not terminated | RS485 RxD terminated (120Ω) |
| S4-2 | RS485 TxD not terminated | RS485 TxD terminated (120Ω) |