microSD

The ECPIX-5 is equiped with a microSD slot. Being wired to a SERDES, it is capable of theoratically achieving UHS-II speeds. A IP4856CX25 level translator allows for dual 1.8V/3.3V SD operation and provides ESD protection.

Pinout

SD

microSD card pin

FPGA pin

Description

CMD

M24

Command/response

CLK

P24

Clock

CD

L22

Card Detect

DAT0

N26

Data line (bit 0)

DAT1

N25

Data line (bit 1)

DAT2

N23

Data line (bit 2)

DAT3

N21

Data line (bit 3)

D0+

AD19

UHS-II lane 0 (Positive)

D0-

AD20

UHS-II lane 0 (Negative)

D1+

AF18

UHS-II lane 1 (Positive)

D1-

AF19

UHS-II lane 1 (Negative)

Level translator

Level translator pin

FPGA pin

Description

SEL

L24

IO voltage selection (High = 1.8V, Low = 3.3V)

CLK_FB

P25

Clock feedback

DIR_CMD

M23

CMD direction (High = Input, Low = Output)

DIR_0

N24

DAT0 direction (High = Input, Low = Output)

DIR_1_3

P26

DAT1-3 direction (High = Input, Low = Output)