SQFlash

Industrial Class 10 Micro SD Card

Specifications subject to change without notice, contact your sales representatives for the most update information.

REV 0.3

Page 10 of 22

May. 4, 2016

5.

Pin Assignment and Block Diagram

pin

SD Mode

SPI Mode

Name

Type

1

Description

Name

Type

Description

1

DAT2

I/O/PP

Data Line[bit2]

RSV

2

CD/DAT3

2

I/O/PP

3

Card Detect/

Data Line[bit3]

CS

I

3

Chip Select (neg

true)

3

CMD

PP

Command/Response

DI

I

Data In

4

S

Supply voltage

S

Supply voltage

5

CLK

I

Clock

SCLK

I

Clock

6

S

Supply voltage ground

S

Supply voltage

ground

7

DAT0

I/O/PP

Data Line[bit0]

DO

O/PP

Data Out

8

DAT1

I/O/PP

Data Line[bit1]

RSV

(1) S: power supply, I: input; O: output using push-pull drivers; PP:I/O using push-pull driver

(2) The extended DAT lines (DAT1-DAT3)are input on power up. They start to operate as DAT lines after

SET_BUS_WIDTH command. The Host shall keep its own DAT1-DAT3 lines in input mode, as well,

while they are not used. It is defined so, in order to keep compatibility to MultiMedia Cards.

(3) At power up this line has a 50KOhm pull up enabled in the card. This resistor serves two functions Card

detection and Mode Selection. For Mode Selection, the host can drive the line high or let it be pulled

high to select SD mode. If the host wants to select SPI mode it should drive the line low. For Card

detection, the host detects that the line is pulled high. This pull-up should be disconnected by the user

during regular data transfer period, with SET_CLR_CARD_DETECT (ACMD42) command.

Name

Width

Description

CID

128bit

Card identification number; card individual number for identification.

Mandatory

RCA

1

16bit

Relative card address; local system address of a card, dynamically

suggested by the card and approved by the host during initialization.

Mandatory

DSR

16bit

Driver Stage Register; to configure the card’s output drivers. Optional

CSD

128bit

Card Specific Data; information about the card operation conditions.

Mandatory

SCR

64bit

SD Configuration Register; information about the SD Memory Card's Special

Features capabilities Mandatory

OCR

32bit

Operation conditions register. Mandatory.

SSR

512bit

SD Status; information about the card proprietary features

Mandatory

OCR

32bit

Card Status; information about the card status

Mandatory