Difference between revisions of "PACmate20 Braille Display"
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| − | + | The Freedom Scientific [http://www.freedomscientific.com/fs_products/PACmate_20.asp PACmate 20] is a 20-cell braille display with two pushbuttons over each cell, and two 'whiz wheels' (mousewheel-type wheels) on either side of the braille area. It connects to a PC or other device via USB, and can be attached to the [http://www.freedomscientific.com/fs_products/PACmate2.asp PACmate notetaker] to integrate them into one device. | |
| − | The [http://www.freedomscientific.com/fs_products/PACmate_20.asp PACmate 20] is a 20-cell braille display with two pushbuttons over each cell, and two 'whiz wheels' (mousewheel-type wheels) on either side of the braille area. It connects to a PC or other device via USB, and can be attached to the [http://www.freedomscientific.com/fs_products/PACmate2.asp PACmate notetaker] to integrate them into one device. | ||
=== Notable Chips === | === Notable Chips === | ||
Revision as of 01:07, 9 November 2009
The Freedom Scientific PACmate 20 is a 20-cell braille display with two pushbuttons over each cell, and two 'whiz wheels' (mousewheel-type wheels) on either side of the braille area. It connects to a PC or other device via USB, and can be attached to the PACmate notetaker to integrate them into one device.
Notable Chips
| Chip | Chip Function | Use in Product |
|---|---|---|
| C8051F320 | Microcontroller w/ USB | Brains of the display, talks to the PC/device natively over USB. |
| LM358 | Op-amp | Don't know |
| TLC555 | Timer | Near large cap, small caps, and inductors. May be part of the HV charge pump? |
USB Descriptors
Configuration descriptor: Total length: 0020 Number of Interfaces: 01 Configuration value: 01 Configuration string: 00 Attributes: 80 [Device doesn't have own power, can't generate remote wakeups] Maximum power usage FA [500mA] Interface descriptor: Interface number: 00 Alternate: 00 Endpoints: 02 Class: FF [Vendor Specific] Subclass: 00 [Ignored: Class FF] Protocol: 00 [Ignored: Class FF] Interface string: 00 Endpoint descriptor: Endpoint address: 01 [10000000: OUT endpoint 1] Attributes: 02 [01000000: Bulk] Maximum packet size: 0040 [64 bytes] Polling interval: 00 [Ignored: Not isochronous or interrupt type] Endpoint descriptor: Endpoint address: 82 [10000010: IN endpoint 1] Attributes: 02 [01000000: Bulk] Maximum packet size: 0040 [64 bytes] Polling interval: 00 [Ignored: Not isochronous or interrupt type]
Images
