Difference between revisions of "PACmate20 Braille Display"
From Hackstrich
(Linkified some words.) |
(Adding USB descriptor info.) |
||
| Line 20: | Line 20: | ||
|Near large cap, small caps, and inductors. May be part of the HV charge pump? | |Near large cap, small caps, and inductors. May be part of the HV charge pump? | ||
|} | |} | ||
| + | |||
| + | == USB Descriptors == | ||
| + | <pre> | ||
| + | Configuration descriptor: | ||
| + | Total length: 0020 | ||
| + | Num.intf: 01 | ||
| + | Conf.value: 01 | ||
| + | Conf.string: 00 | ||
| + | Attr.: 80 | ||
| + | Max.pwr: FA | ||
| + | |||
| + | Interface descriptor: | ||
| + | Intf.number: 00 | ||
| + | Alt.: 00 | ||
| + | Endpoints: 02 | ||
| + | Class: FF | ||
| + | Subclass: 00 | ||
| + | Protocol: 00 | ||
| + | Intf.string: 00 | ||
| + | |||
| + | Endpoint descriptor: | ||
| + | Endpoint address: 01 | ||
| + | Attr.: 02 | ||
| + | Max.pkt size: 0040 | ||
| + | Polling interval: 00 | ||
| + | |||
| + | Endpoint descriptor: | ||
| + | Endpoint address: 82 | ||
| + | Attr.: 02 | ||
| + | Max.pkt size: 0040 | ||
| + | Polling interval: 00 | ||
=== Images === | === Images === | ||
Revision as of 21:20, 8 November 2009
PACmate 20 Braille Display
The 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 Num.intf: 01 Conf.value: 01 Conf.string: 00 Attr.: 80 Max.pwr: FA Interface descriptor: Intf.number: 00 Alt.: 00 Endpoints: 02 Class: FF Subclass: 00 Protocol: 00 Intf.string: 00 Endpoint descriptor: Endpoint address: 01 Attr.: 02 Max.pkt size: 0040 Polling interval: 00 Endpoint descriptor: Endpoint address: 82 Attr.: 02 Max.pkt size: 0040 Polling interval: 00Images
