GL828 USB 2.0 SD/MMC Single Slot Card Reader Controller

©2000-2006 Genesys Logic Inc. - All rights reserved.

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3.3 Pin Descriptions

Table 3.2 - Pin Descriptions

Pin name

GL828

LQFP48 Pin

Type

Description

VDD18O

4

P

Internal regulator 1.8V output

GND

5,9,12

P

Analog ground

AVDD

6,11

P

Analog power

DM

7

A

USB D-

DP

8

A

USB D+

RREF

10

A

Reference resistor

X1

13

OSC

12MHz/48MHz input. This pin can be connected to one terminal of crystal or

external 12MHz/48MHz clock source.

X2

14

OSC

12MHz/48MHz output. This is another terminal of the crystal or NC when

using an external 12MHz/48MHz clock source is used to drive PLL.

DVDD

15,26,35

P

Digital power 3.3V

GND

16,27,34

P

Digital ground

VP5

25

P

Regulator 5V Input

PMOSO

36

PMOS

Power MOS 3.3V Output

TEST_MOD

17

I, pd

Test mode selection

EXTRSTZ

18

I, pu

External reset. It is active low. The low pulse should be 1 us width at least.

SD_CDZ

23

B/I, pd

SD& MMC Card detection. Normal High, active low.

D0~D7

40,43,37,29,28,

30,32,38

B/I, f

SD data 0~3

MMC data 0~7

SD_CLK

39

B/I, f

SD/MMC CLK

SD_WPZ

3

B/I, pu

SD Write Protect Detection. When no card is inserted, pull low. When SM or

SD card is inserted, the pin is pull up and active low.

SD_CMD

41

B/I, f

SD/MMC CMD

GPIO0~3

41,48,47,46

B/I, pd

GPIO0~3 / GPIO3 : Power LED

SK

19

B/I, pd

93C46 Clock

CS

20

B/I, pd

93C46 CS

DO

21

B/I, pd

93C46 Data out

DI

22

B/I, pd

93C46 Data in / Access LED

Notation:

Type

A

Analog

B

Bi-directional

B/I

Bi-directional, default input

B/O

Bi-directional, default output

I

Input