PACmate20 Braille Display

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:       00

Images