SDAA089 September 2025 DP83826E , DP83826I
3.3 Hardware Strapping
DP83848 and DP83826A share some common strappable configurations as shown in Table 3-1. Pin numbers are shown in Table 3-3.
| PHY | DP83848 LQFP | DP83848 QFN | DP83826A |
|---|---|---|---|
| PHY Address [0] | COL (42) | COL (35) | LED0 (30) |
| PHY Address [1] | RX_D0 (43) | RX_D0 (36) | CRS/LED3 (29) |
| PHY Address [2] | RX_D1 (44) | RX_D1 (37) | COL/LED2 (28) |
| Auto-Negotiation Enable | LED_ACT/COL (26) | N/A | RX_D0 (16) |
| Auto-MDIX Enable | RX_ER (41) | RX_ER (34) | RX_D1 (15) |
| MAC Interface | RX_DV (39) TX_D3 (6) |
RX_DV (32) | RX_D2 (14) (If strapped Odd Nibble enabled) |
DP83848 has some exclusive functions that can be strapped as described in Table 3-2. Pin numbers are shown in Table 3-3.
| PHY | DP83848 LQFP | DP83848 QFN |
|---|---|---|
| PHY Address [3] | RX_D2 (45) | RX_D2 (38) |
| PHY Address [4] | RX_D3 (46) | RX_D3 (39) |
| Speed/Duplex Configuration | LED_SPEED (27) LED_LINK (28) | LED_SPEED (21) LED_LINK (22) |
| LED Configuration | CRS (40) | CRS (33) |
DP83826A has some exclusive functions that can be strapped as described in Table 3-3. Pin numbers are shown in Table 3-3.
| Strap | DP83826A Pin Name (Number) |
|---|---|
| Manual MDI/MDIX Configuration (Applicable if Auto-MDIX is disabled) | RX_DV (18) |
| CLKOUT Functionality | RX_ER (20) |
| Odd Nibble Enable | CLKOUT/LED1 (31) |
| Type of RMII | TX_CLK (22) |
| RMII Repeater | RX_D3 (13) (if strapped to RMII) |
| Fast Link Drop Configuration | RX_D3 (13) (if strapped to MII) RX_CLK (19) RX_D2 (14) (if strapped to Odd Nibble Disable with FLD enabled) |
As there are many dependencies in DP83826A for bootstrapping, Figure 3-6 can help decipher the different configurations available.
Figure 3-6 DP83826A Enhanced Mode Strapping Flowchart