SL811HS

48/28-Pin USB Host Controller Pins Description

The SL811HST-AXC is packaged in a 48-pin TQFP. The SL811HS and SL811HS-JCT packages are 28-pin PLCC’s. These devices require a 3.3 VDC power source. The 48-Pin TQFP requires an external 12 or 48 MHz crystal or clock.

Table 35. 48/28-Pin TQFP AXC Pin Assignments and Definitions

48-Pin TQFP

28-Pin PLCC

Pin Type

Pin Name

Pin Description

AXC Pin No.

Pin No.

 

 

 

1

NC

NC

No connection.

 

 

 

 

 

2

NC

NC

No connection.

 

 

 

 

 

3

5

IN

nWR

Write Strobe Input. An active LOW input used with nCS to write

 

 

 

 

to registers/data memory.

4

6

IN

nCS

Active LOW 48-Pin TQFP Chip select. Used with nRD and nWr

 

 

 

 

when accessing the 48-Pin TQFP.

5[5]

7[6]

IN

CM

Clock Multiply. Select 12 MHz/48 MHz Clock Source.

6

8

VDD1

+3.3 VDC

Power for USB Transceivers. VDD1 may be connected to VDD.

7

9

BIDIR

DATA +

USB Differential Data Signal HIGH Side.

 

 

 

 

 

8

10

BIDIR

DATA -

USB Differential Data Signal LOW Side.

 

 

 

 

 

9

11

GND

USB GND

Ground Connection for USB.

 

 

 

 

 

10

NC

NC

No connection.

 

 

 

 

 

11

NC

NC

No connection.

 

 

 

 

 

12

NC

NC

No connection.

 

 

 

 

 

13

NC

NC

No connection.

 

 

 

 

 

14

NC

NC

No connection.

 

 

 

 

 

15[7]

12

VDD

+3.3 VDC

Device VDD Power.

16

13

IN

CLK/X1

Clock or External Crystal X1 connection. The X1/X2 Clock

 

 

 

 

requires external 12 or 48 MHz matching crystal or clock source.

17

14

OUT

X2

External Crystal X2 connection.

 

 

 

 

 

18

15

IN

nRST

Device active low reset input.

 

 

 

 

 

19

16

OUT

INTRQ

Active HIGH Interrupt Request output to external controller.

 

 

 

 

 

20

17

GND

GND

Device Ground.

 

 

 

 

 

21

18

BIDIR

D0

Data 0. Microprocessor Data/Address Bus.

22

NC

NC

No connection.

 

 

 

 

 

23

NC

NC

No connection.

 

 

 

 

 

24

NC

NC

No connection.

 

 

 

 

 

25

NC

NC

No connection.

 

 

 

 

 

26

NC

NC

No connection.

 

 

 

 

 

27

19

BIDIR

D1

Data 1. Microprocessor Data/Address Bus.

28

20

BIDIR

D2

Data 2. Microprocessor Data/Address Bus.

 

 

 

 

 

29

21

BIDIR

D3

Data 3. Microprocessor Data/Address Bus.

 

 

 

 

 

30

22

GND

GND

Device Ground.

 

 

 

 

 

31

23

BIDIR

D4

Data 4. Microprocessor Data/Address Bus.

 

 

 

 

 

32

24

BIDIR

D5

Data 5. Microprocessor Data/Address Bus.

 

 

 

 

 

Notes

5.The CM Clock Multiplier pin must be tied HIGH for a 12 MHz clock source and tied to ground for a 48 MHz clock source.

6.The CM Clock Multiplier pin must be tied HIGH for a 12 MHz clock source and tied to ground for a 48 MHz clock source. In 28-pin PLCC’s, this pin is designated as an ALE input pin.

7.VDD can be derived from the USB supply. See Figure 5 on page 19.

Document 38-08008 Rev. *D

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Cypress SL811HS manual 48/28-Pin USB Host Controller Pins Description