| ??? 03/07/06 23:14 Modified: 03/07/06 23:25 Read: times |
#111564 - Re: 20-pin DIP controller Responding to: ???'s previous message |
Curtis,
Firstly, since I could possibly be able to solder in your chip in place of the 74HC245, how would I interface the ribbon header to vga? Well, not exactly, you would need a few (two) uncomitted port pins on your microcontroller (I assume you use 8051, but that doesn't matter) and you can discard the ribbon cable. The VGA port is then connected to the output of the VTC200AX via a few current-limiting resistors. Also, although the VTC200AX is a 20-pin device, it is not pin compatible with 74HC245! In other words, would the Toshiba controller that now follows my ribbon controller and the chips associated with it no longer be needed to get my info on to the monitor instead of the LCD? Yes! However you will need to 'talk' to the VTC200AX 'serially' (shift register mode, not UART). Send an E-mail to the address listed in my profile to get a copy of the product datasheet. Alternatively, you can also go down the FPGA path, and include an 8051 (or whatever MCU) 'soft core', along with a graphics interface engine - onto a single (not including the config ROM) chip. VA |
