Media Local Bus (MediaLB) is an on-PCB or inter-chip communications bus, specifically designed to standardize a common hardware interface and software API library. This standardization allows an application or multiple applications to access the MOST® (Media Oriented Systems Transport) Network data, or to communicate with other applications, with minimum effort.
On SAM V71 Xplained Ultra the MLB module of the ATSAMV71Q21 is connected to a MediaLB connector implemented with a 40 pin SAMTEC QSH-020-01-L-D-DP-A. This connector is intended to interface with a board that includes the MOST INIC and the MOST-50 physical layer connector (such as a Physical+ Interface Board OS81092 ePhy) or with other MOST tools. Table 1 shows all connections between the ATSAMV71Q21 and the connector.
| Pin number | SAM V71 Pin | Function | Shared functionality |
|---|---|---|---|
| 1 [RESERVED] | - | - | |
| 2 [MLB CLK] | PB04 | MLBCLK | EXT2, Shield, and EDBG CDC |
| 3 [RESERVED] | - | - | |
| 4 [MLB_ID0] | - | - | |
| 5 [MLB_ID4] | - | - | |
| 6 [MLBSIG] | PD10 | MLBSIG | |
| 7 [MLB_ID3] | - | - | |
| 8 [MLB_ID1] | - | - | |
| 9 [SCK] | - | - | |
| 10 [MLBDAT] | PB05 | MLBDAT | EDBG Debug |
| 11 [FSY] | - | - | |
| 12 [MLB_ID2] | - | - | |
| 13 [RESERVED] | - | - | |
| 14 [SX0] | - | - | |
| 15 [RESERVED] | - | - | |
| 16 [RMCK] | PA02 | RMCK | LCD, EXT2, Shield, and EDBG GPIO3 |
| 17 [RESERVED] | - | - | |
| 18 [SR0] | - | - | |
| 19 [RESERVED] | - | - | |
| 20 [RESERVED] | - | - | |
| 21 [PS0] | - | - | |
| 22 [PS1] | - | - | |
| 23 [STATUS] | - | - | |
| 24 [PWROFF] | - | - | |
| 25 [RESET_N] | PA06 | GPIO | Camera, EXT2, and Shield |
| 26 [RSOUT] | - | - | |
| 27 [ERR/BOOT] | PB03 | GPIO | Camera, EXT1, and Shield (2) |
| 28 [MCK_IN] | - | - | |
| 29 [TCK/DSCL] | - | - | |
| 30 [TMS] | - | - | |
| 31 [TDO/DINT] | - | - | |
| 32 [TDI/DSDA] | - | - | |
| 33 [I2C_SCL] | PA04 | TWCK0 | EXT1, EXT2, 2EDBG IC,LCD, Audio, PLL, Camera, EEPROM, Crypto, and Shield |
| 34 [MLB_INT] | PB02 | GPIO | EXT1, Shield (2) |
| 35 [I2C_SDA] | PA03 | TWD0 | EXT1, EXT2, 2EDBG IC,LCD, Audio, PLL, Camera, EEPROM, Crypto, and Shield |
| 36 [RESERVED] | - | - | |
| 37 [3V3_SWITCHED] | - | - | |
| 38 [3V3_CONTINOUS] | - | - | |
| 39 [3V3_SWITCHED] | - | - | |
| 40 [12V0_CONTINOUS] | - | - |