Cypress Semiconductor SL811HS Manual do Utilizador descarregar pdf (Página 14)

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: 14

1. CPU_GPIO detects that a cable is for “Host”.

2. Start supplying USB Bus power.

Connector for Slave

GND

USB Bus power switch

D-

VBUS

CPU_GPIO

VCC

D+

1. CPU_GPIO detects that a cable is for “Slave”.

2. Never supply USB Bus power.

(Example.2) Using two connectors on host side.

See “SL811HS and SL811HST: Application Notes page.8” for the layout.

Supplier must explain to the customer, “ Host and Slave must not be used at the same time”

because it will break the system.

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Cypress Semiconductor SL811HS Manual do Utilizador Página 14