Philips Semiconductors
Interconnectivity
_____________________________________________________________________________________
Philips Semiconductors - Asia Product Innovation Centre
Visit http://www.flexiusb.com
11 January 1999
PDIUSBH11A/H12/D12 Evaluation Kit
User’s Manual
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PDIUSBH11A/H12/D12 Evaluation Kit: User Manual
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Introduction
This demo kit uses the PDIUSBH11A (H11A) hub device. The Rev 1.1 Kit precedes the
previous release with added functionality and fixes that will be explained in the later part
of this application note.
Functionality has been expanded such that the same Hub board can be used to
implement a USB Hub with Monitor control system. The USB Monitor Control system,
classified under a HID device, is implemented using the embedded function of the
H11A. However, the usage of the embedded function of H11A is not exclusive to
Monitor Control.
The firmware to control the H11A is backward compatible to the H11 except for some
minor changes to fully utilize the new features of the H11A.
Features
This release of the Philips Hub contains the following items:
n Main Philips Hub module
n Add on VGA pass-through Module
n H12/D11-H11A Converter
n Diskette containing the firmware, applet and this document
n USB Cable
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PDIUSBH11A/H12/D12 Evaluation Kit: User Manual
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Main Philips Hub Module
1. CONNECTORS
See table below for the list of connectors
Name Description
J1 USB Upstream connector
J2 USB Downstream connector, Port 2∗
J3 USB Downstream connector, Port 3∗
J4 USB Downstream connector, Port 4∗
J5 USB Downstream connector, Port 5∗
JP1 Power input for self-powered hub
JP2 Expansion bus
S1 Self-powered or bus-powered selection switch.
∗The embedded port of the H11A rest on Port 1, thus all the physical ports are
numbered from Port 2 to Port 5.
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2. Power input (for Self-powered operation)
3. EXPANSION BUS
Pin number Description
1 - GND Ground
2 – Clkout Clock output from the H11A
3 – TXD Transmit Data (from the UART of the micro-controller)
4 – SCL SCL - to the H11A/H12/D11
5 – SDA SDA - to the H11A/H12/D11
6 - INT_N Interrupt from the H11A, active low
7 – SUSPEND Suspend indicator from the H11A
8 – RXD Receive Data (from the UART of the micro-controller)
9 - HWSCL Hardware I2C SCL pin from the micro-controller
10 - HWSDA Hardware I2C SDA pin from the micro-controller
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4. INDICATORS
See table below for the list of LED indicators
Name Description
LED1 (red) This LED indicates that the downstream ports are powered.
Upon proper configuration of the Hub, this LED should be
lighted to indicate that the downstream are powered
properly.
LED2 (green) LED 2 indicates that the downstream port 2 is enabled.
Whenever downstream port is attached and a proper port
detection is done, the downstream port is enabled. If the
H11A is in GoodLinkTM mode, this LED blinks when traffic is
detected via Port 2.
LED3 -5
(green) same as LED2 except that they correspond to downstream
ports 3 to 5 respectively.
There are two DIP sockets for the 51 family of micro-controllers, they are the DIP24 and
DIP40. Either one can be used.
DIP24 : 83C748/87C748 (2K EPROM/ROM, 64 RAM)
83C751/87C751 (2K EPROM/ROM, 64 RAM)
DIP40 : Generic 80C51 (4K ROM)
The above is not an exhausted list. The only consideration would be the ROM size
required for the application.
VGA Passthrough Module
This module acts as a pass through for the
normal VGA signals. The wiring for the
DDC2B+/2AB monitor control protocol is tapped
and routed to the micro-controller via JP2. To
use this module, insert it on JP2 of the main
board.
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PDIUSBH11A/H12/D12 Evaluation Kit: User Manual
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H12/D11-H11A Converter
This is a piggyback module on the H11A socket to match the DIP foot-print of
PDIUSBD11 and PDIUSBH12.
System Configuration
The demo kit serves as an evaluation and development platform for the PDIUSBH11A,
PDIUSBH12 or the PDIUSBD11. Each of the configuration requires the designated
firmware on the micro-controller before it can perform its desired function.
Standalone Hub
1. H11A (H11A12h.asm)
Only the main Philips Hub module is required. The module can be either bus-powered
or self-powered. To implement a bus-powered hub, S1 needs to be switched to bus-
powered. The firmware will auto-detect if it is self or bus powered and supply the
appropriate descriptors to the Host.
All four downstream ports are utilized.
The firmware to implement this is H11A12h.asm. H11A12h.hex, the Intel Hex version is
also contained on the disk.
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Monitor Control (Device only)
2. D11 (D11V11m.asm)
The main Philips Hub module, the H12/D11-H11A converter and the VGA pass-through
module are required. Attach the VGA Pass through module to JP2 of the main board.
Route the VGA cable from the Host to the VGA-in of the module, and, connect another
VGA cable from the VGA-out to a DDC2B+/2AB compatible Monitor∗.
The principle of operation is as follows. Monitor Control instructions are passed from
the host to the USB Monitor Control firmware which deciphers and sends out the
corresponding DDC2B+/2AB instruction to control the monitor.
The firmware to implement this is D11V11m.asm. D11V11m.hex, an Intel Hex version
is also contained on the disk.
The H11A is software compatible to the D11. Thus development work can also be done
on the H11A.
∗This cannot work if the Monitor does not support DDC2B+/2AB.
Hub with Monitor Control
3. H11A (H11A14hm.asm)
The main Philips Hub module and the VGA pass-through module are required. Attach
the VGA Pass through module to JP2 of the main board. Route the VGA cable from the
Host to the VGA-in of the module, and, connect another VGA cable from the VGA-out to
a DDC2B+/2AB compatible Monitor.
The firmware to implement this is H11A14hm.asm. H11A14hm.hex, an Intel Hex
version is also contained on the disk.
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PDIUSBH11A/H12/D12 Evaluation Kit: User Manual
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Bugs and Fixes
The improvements done on the USB Hub rev 1.1 are fixes to improve the robustness of
the original H11A Hub.
1. Overcurrent Fix
To remove false overcurrent detection due to in-rush current during plugging of
downstream port devices, it is recommended that a low-pass configuration as shown
below is used.
2. Suspend pull-up Fix
The suspend pin from the H11A is an open-drain output, it should be pull-up to a +5V
instead of +3.3V.
3. Internal H11A Reset
The Rev 1.1 no longer relies on an RC configuration for it’s power on reset. The
Reset_N pin is connected directly to +3.3V.