Cypress Semiconductor SL811HS Manual do Utilizador descarregar pdf (Página 2)

Cypress Semiconductor Corporation

SL811HS and SL811HST: Application Notes

and specifications contained in this document are subject to change without

notice.

Date: 07/26/01

Revision: 1.21

Page: 2

Conventions .................................................................................................................................5

Definitions .....................................................................................................................................5

References: ..................................................................................................................................5

Revision History...........................................................................................................................5

1. Introduction.......................................................................................................................6

1.1. OVERVIEW......................................................................................................................... 6

2. SL811HS Host or Slave MODE ....................................................................................7

2.1. OVERVIEW......................................................................................................................... 7

2.2. HARDWARE REQUIREMENTS ................................................................................................. 7

2.1.1 External Controller and USB connectors...................................................................7

2.3. POWER ON AND RESET MODE .............................................................................................. 7

2.4. SWITCHING LOGIC............................................................................................................... 9

2.5. SOFTWARE INITIALIZATION...................................................................................................10

2.5.1 Initialization from Host to Slave ...............................................................................11

2.5.2 Initialization from Slave to Host...............................................................................12

2.6. M/S PIN (PIN27/PIN40) .......................................................................................................13

2.7. PULL-UP/DOWN REGISTERS ON USB LINES ............................................................................13

2.8. HOST/SLAVE DETECTOR .....................................................................................................13

3. Programming Information ............................................................................................15

3.1. HOST AND DEVICE PROGRAMMING .......................................................................................15

3.2. SL811HS USB CONTROL REGISTERS .................................................................................15

3.3. SL811HS MEMORY MAP ................................................................................................16

3.3.1 Control Registers.....................................................................................................17

3.3.2 Memory Buffer..........................................................................................................18

3.4. INTERRUPT STATUS REGISTER.............................................................................................19

4. SL811HS host software................................................................................................20

4.1. SOFTWARE APPLICATION.............................................................................................20

4.1.1 Single Write Operation.............................................................................................20

4.1.2 Single Read Operation.............................................................................................21

4.1.3 Memory Test............................................................................................................21

4.1.4 USB Reset ...............................................................................................................22

4.1.5 CRC5/16 Generation ...............................................................................................23

4.1.6 Zero Length Packet..................................................................................................23

4.1.7 Double Buffer Operation ..........................................................................................23

4.1.8 Single IN Packet.......................................................................................................24

4.1.9 Single OUT Packet ..................................................................................................25

4.1.10 Short Data Packet....................................................................................................25

4.1.11 USB Device Detection .............................................................................................26

4.1.12 Full/Low Speed Detect.............................................................................................26

4.1.13 SOF or EOP Generation..........................................................................................28

4.1.14 Suspend State..........................................................................................................30

4.1.15 Resume Wakeup .....................................................................................................30

4.1.16 Specific Command Transfer....................................................................................31

4.1.17 USB Transfer (Bulk/ISO/Control/Interrupt)..............................................................31

4.1.18 Device Enumeration.................................................................................................32

5. SL811HS usb transfer ..................................................................................................33

5.1. CONTROL TRANSFER..........................................................................................................36

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