PDIUSBH11A データシートの表示（PDF） - Philips Electronics
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PDIUSBH11A Datasheet PDF : 28 Pages
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Philips Semiconductors
Universal Serial Bus Hub
Product specification
PDIUSBH11A
COMMAND DESCRIPTIONS
Command Procedure
There are four basic types of commands: Initialization, Data, Hub
Specific, and General commands. Respectively, these are used to
initialize the hub and embedded function; for data flow between the
hub, embedded function, and the host; some Hub Specific
commands for controlling individual downstream ports; and some
General commands.
Initialization Commands
Initialization commands are used during the enumeration process of
the USB network. These commands are used to enable the hub and
embedded function endpoints. They are also used to set the USB
assigned address.
Set Address / Enable
Command
Data
: D0h (Hub), D1h, D2h, D3h,
(Embedded Functions)
: Write 1 byte
This command is used to set the USB assigned address and enable
the hub or embedded functions respectively. The hub powers up
enabled and needs not be enabled by the firmware at power up
initialization.
76 54 32 1 0
00 00 00 00
POWER ON VALUE
ADDRESS
ENABLE
SV00825
Address
Enable
The value written becomes the address.
A ‘1’ enables this function.
Set Endpoint Enable
Command
Data
: D8h
: Write 1 byte
The hub’s interrupt endpoint and the embedded functions generic
endpoints can only be enabled when the corresponding hub/function
is enabled via the Set Address/Enable command.
7 6 54 3 2 10
X X X X 0 0 0 0 POWER ON VALUE
HUB’S INTERRUPT ENDPOINT
EMBEDDED FUNCTION 1 GENERIC ENDPOINTS
EMBEDDED FUNCTION 6 GENERIC ENDPOINTS
EMBEDDED FUNCTION 7 GENERIC ENDPOINTS
RESERVED
SV00841
Hub’s Interrupt Endpoint
Embedded Function 1
Generic Endpoint
Embedded Function 6
Generic Endpoint
Embedded Function 7
Generic Endpoint
A value of ‘1’ indicates the hub’s
interrupt endpoint is enabled.
A value of ‘1’ indicates the
embedded function 1 generic
endpoints are enabled.
A value of ‘1’ indicates the
embedded function 6 generic
endpoints are enabled.
A value of ‘1’ indicates the
embedded function 7 generic
endpoints are enabled.
1999 Jul 22
11
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