USS-820D データシートの表示（PDF） - Agere -> LSI Corporation

部品番号

コンポーネント説明

メーカー

USS-820D

USB Device Controller

Agere -> LSI Corporation 

USS-820D

USB Device Controller

Data Sheet, Rev. 4

June 2001

Pin Information (continued)

Table 2. Pin Descriptions

44-Pin MQFP

(USS-820D)

1

2

3

4

5

6

7

12, 11, 10, 9,

8

13

14, 20, 21,

22, 23, 24,

34, 40

15

18

16

17, 44

19

25

26

48-Pin TQFP

(USS-820TD)

2

3

4

5

6

7

8

13, 12, 11,

10, 9

14

15, 22, 23,

24, 25, 26,

37, 43

16

19

1, 17, 20, 21,

27

18, 47

48

28

29

Symbol*

VDDA

XTAL1

XTAL2

VDDT

DMNS

DPLS

VSST

A[4:0]

VSSX

VSS0, VSS1,

VSS2, VSSX

DSA

USBR

NC†

VDD0, VDD1

DPPU

RWUPN

SUSPN

Type

P

I

O

P

I/O

I/O

P

I

P

P

O

O

—

P

O

I

O

Name/Description

3.3 V Power Supply for Analog PLL.

Crystal/Clock Input. If the internal oscillator is used, this is

the crystal input. If an external oscillator is used, this is the

clock input.

Crystal/Clock Output. If the internal oscillator is used, this

is the crystal output. If an external oscillator is used, this

output should be left unconnected.

3.3 V Power Supply for USB Transceiver.

USB Differential Data Bus Minus.

USB Differential Data Bus Plus.

Device Ground for USB Transceiver.

Address Bus. This is the address bus for the controller to

access the register set.

Device Ground. For compatibility with USS-820 revision B,

this pin can be connected to a controller address bit, as

long as it is guaranteed to be equal to 0 during register

accesses and meets all address pin timing requirements.

Device Ground.

Data Set Available. Indicates one or more receive data

sets are valid, or one or more transmit data sets are empty

(available). For compatibility with USS-820 revision B, this

output is 3-stated if MCSR.BDFEAT = 0.

USB Reset Detected. Indicates a USB reset event has

been detected on USB. This pin will remain asserted until

the SSR.RESET register bit is cleared by firmware. For

compatibility with USS-820 revision B, this output is 3-

stated if MCSR.BDFEAT = 0.

No Connect.

3.3 V Power Supply.

DPLS Pull-Up. Can be used to supply power to the DPLS

1.5 kΩ pull-up resistor to allow firmware to simulate a

device physical disconnect. This pin is directly controlled by

the DPEN register bit.

Remote Wake-Up (Active-Low). Device is initiating a

remote wake-up from a suspend condition. This input is

ignored if SCR register bit RWUPE = 0.

Suspend (Active-Low). USB suspend has been detected;

chip has entered suspend (low power) mode. This pin is

deasserted when a wake-up event is detected.

* Active-low signals within this document are indicated by an N following the symbol names.

† Pins marked as NC must have no external connections, except where noted.

8

Agere Systems Inc.

Share Link: