Intel E3815 FH8065301567411 Data Sheet

Product codes
FH8065301567411
Page of 5308
Storage Control Cluster (eMMC, SDIO, SD Card)
Intel
®
 Atom™ Processor E3800 Product Family
1746
Datasheet
16.2
Features
16.2.1
eMMC Interface Features
eMMC 4.5 controller supported
Transfers the data in 1 bit, 4 bit and 8 bit modes.
Transfers data in the following speed classes: Baseline (1, 4, 8 bit up to 25Mhz), HS 
SDR/DDR (4, 8 bit up to 50Mhz) and HS200 (4, 8 bit up to 200MHz - 4.5 controller 
only)
Cyclic Redundancy Check CRC7 for command and CRC16 for data integrity.
Supports MMC Plus and MMC mobile.
Supports both round-robin and priority-based arbitration for transmit operation.
Run-time configurabilty of channel ID bits.
Table 181. SD Card Signals 
Signal Name
Direction
Power
Description
SD3_CLK
O
VSDIO
SD Card Clock
The frequency may vary between 24 and 50 MHz.
SD3_D[3:0]
I/O
VSDIO
SD Card Data bits 0 to 3
Bidirectional port used to transfer data to and from SD card.
By default, after power up or reset, only D[0] is used for data transfer. A 
wider data bus can be configured for data transfer, using D[0]-D[3].
SD3_CD#
I/O
V1P8S
SD Card Detect
Active low when a card is present. Floating (pulled high with internal PU) 
when a card is not present. 
SD3_CMD
I/O
VSDIO
SD Card Command 
This signal is used for card initialization and transfer of commands. It has 
two modes—open-drain for initialization, and push-pull for fast command 
transfer.
SD3_1P8EN
O
V1P8S
SD Card 1.8V Enable
Indicates the voltage of the SD Card to the power delivery subsystem. The 
default voltage (3.3 V) is requested when this signal is driven low. 1.8 V is 
requested when this signal is high. This voltage change applies to the 
SD3_V1P8V3P3_S3 (VSDIO) rail on the SoC.
SD3_RCOMP
-
SD Card RCOMP
This signal is used for pre-driver slew rate compensation.
SD3_WP
I
V1P8S
SD Card Write Protect
Active high to protect from write.
SD3_PWREN#
O
V1P8S
SD Card Power Enable
This signal is used to enable power on a SD device.