PDIUSBH12 datasheet(15/28 Pages) PHILIPS

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Philips Semiconductors

Product specification

PDIUSBH12

USB 2-port hub

1999 Jul 22

Set Endpoint Status

Command

: 40–4Dh

Data

: Write 1 byte

A stalled control endpoint is automatically unstalled when it receives

a SETUP token, regardless of the content of the packet. If the

endpoint should stay in its stalled state, the microcontroller can

re-stall it.

When a stalled endpoint is unstalled (either by the Set Endpoint

Status command or by receiving a SETUP token), it is also

re-initialized. This flushes the buffer and if it is an OUT buffer it waits

for a DATA 0 PID, if it is an IN buffer it writes a DATA 0 PID.

Even when unstalled, writing Set Endpoint Status to ‘0’ initializes the

endpoint.

POWER ON VALUE

STALLED

RESERVED

SV00834

Stalled

A ‘1’ indicates the endpoint is stalled.

Acknowledge Setup

Command

: F1h

Data

: None

The arrival of a SETUP packet flushes the IN buffer and disables the

Validate Buffer and Clear Buffer commands for both IN and OUT

endpoints.

The microcontroller needs to re-enable these commands by the

Acknowledge Setup command. This ensures that the last SETUP

packet stays in the buffer and no packet can be sent back to the

host until the microcontroller has acknowledged explicitly that it has

seen the SETUP packet.

The microcontroller must send the Acknowledge Setup command to

both the IN and OUT endpoints.

Hub Commands

Hub commands are used to report connectivity and power status

between the hub and the host. These commands allow the host to

enable each port individually and get any change of status such as

new connectivity information.

Clear/Set Port Feature

Command

: E0–E1h (Clear) and E8h–E9h (Set)

Data

: Write 1 byte

The data written in the data phase is the feature code described in

Table 4.

When the controller receives a Set Feature or a Clear Feature

request, there are two possibilities:

The request applies to port 1, the embedded port. In this case the

request should be handled internally by the controller.

If the request applies to ports 2 and 3, the controller should translate

the request into a Set Feature or Clear Feature command towards

the PDIUSBH12.

When the PDIUSBH12 is configured in mode 0, there is only one

power switch output and one overcurrent input. This means that the

F_PORT_POWER and C_PORT_OVERCURRENT features are not

port specific. For these features, any of the Set / Clear Feature

commands can be used. The specific port assignment is ignored.

When the PDIUSBH12 is configured in mode 1, there is still only one

power switch output but there are two individual overcurrent input

pins corresponding to each port. This means that the

F_PORT_POWER feature is port specific and the

C_PORT_OVERCURRENT feature is not port specific.

Setting the F_PORT_POWER feature turns the power on when it is

off and turns the overcurrent detection on only when the power is

already on. This allows it to have a short period of overcurrent

condition at the moment that power is switched on. For this reason,

the F_PORT_POWER feature needs to be set twice. Clearing this

feature turns both the power and the overcurrent detection off.

Table 4.

FEATURE

FEATURE CODE

SET

CLEAR

F_PORT_ENABLE

Enables a port

Disables a port

F_PORT_SUSPEND

Suspends a port

Resumes a port

FC_PORT_RESET

Resets a port

Clears a port Reset Change bit

F_PORT_POWER

Powers all ports

Unpowers all ports

C_PORT_CONNECTION

–

Clears a port Connection Change bit

C_PORT_ENABLE

–

Clears a port Enable Change bit

C_PORT_SUSPEND

–

Clears a port Suspend Change bit

C_PORT_OVERCURRENT

–

Clears a port (Mode 1) or hub (Mode 0) Overcurrent Change bit

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