Integration Manual

Table Of Contents
TOBY-L3 series - System Integration Manual
TSD-19090601 - R13 System Integration Manual Page 52 of 143
1.10 eMMC interface
TOBY-L3 series modules include a 4-bit embedded Multi-Media Card interface compliant with the JESD84-
B451 Embedded Multimedia Card (eMMC) Electrical Standard 4.51 [9]. The following signals are provided
for connection and management of an external eMMC / SD memory by means of the open CPU API:
V_MMC Interface supply output (module output)
MMC_D0 Multi-Media Card Data [0], bidirectional signal (module input/output)
MMC_D1 Multi-Media Card Data [1], bidirectional signal (module input/output)
MMC_D2 Multi-Media Card Data [2], bidirectional signal (module input/output)
MMC_D3 Multi-Media Card Data [3], bidirectional signal (module input/output)
MMC_CMD Multi-Media Card Command, bidirectional signal (module input/output)
MMC_CLK Multi-Media Card Clock (module output)
MMC_RST_N Multi-Media Card Reset (module output)
MMC_CD_N Multi-Media Card Detect (module input)
Supported Bus Speed Modes:
SD2.0 Default Speed mode: 2.85V signaling, up to 25 MHz, up to 12.5 MB/s
SD2.0 High Speed Mode: 2.85V signaling, up to 50 MHz, up to 25 MB/s
SD3.0 SDR12: 1.8V signaling, up to 25 MHz, up to 12.5 MB/s
SD3.0 SDR25: 1.8V signaling, up to 50 MHz, up to 25 MB/s
SD3.0 SDR50: 1.8V signaling, up to 100 MHz, up to 50 MB/s
SD3.0 SDR104 1.8V signaling, up to 208MHz, up to 104MB/s
SD3.0 DDR50: 1.8V signaling, up to 50 MHz, sampled on both clock edges, up to 50 MB/s
eMMC Backward Compatibility Mode: 1.8V / 2.85V signaling, up to 26 MHz, up to 26 MB/s
eMMC High Speed SDR Mode: 1.8V / 2.85V signaling, up to 52 MHz, up to 52 MB/s
eMMC High Speed DDR Mode: 1.8V / 2.85V signaling, up to 52 MHz, up to 104 MB/s