| ??? 08/03/07 13:01 Read: times |
#142699 - bits and pieces Responding to: ???'s previous message |
You dont have SRAM for buffer.
how do you know? many derivatives have plenty of RAM on chip and, also, it could be that he is "running out of pins" because he is adding external memory. This brings me to the following re LCD speed: If you have a FULL RAM buffer (even better two) the speed will, probably, be acceptable. If you do not have a FULL RAM buffer the speed will, probably, not be acceptable. another thing: Why monkey with shift registers and other Mickey Mouse solutions? get a LCD with a serial interface. anote re "running out of pins" If you use any external memory you will be "running out of pins" in almost every case. Today there are so many derivatives that have HUGE resources internally such as the P89C668 if you insist on living in a 5V world. If you accept reality and go 3V3 you can get things like 128k flash, 8k RAM and 8 ports from e.g. SILabs. Srik |
| Topic | Author | Date |
| changing lcd 128x64 to serial | 01/01/70 00:00 | |
| depends | 01/01/70 00:00 | |
| bits and pieces | 01/01/70 00:00 | |
| RE: Why monkey with shift registers...? | 01/01/70 00:00 | |
| Swings and roundabouts | 01/01/70 00:00 | |
| Check your Data Sheet | 01/01/70 00:00 | |
| back to parallel mode | 01/01/70 00:00 | |
| Parralel to Serial | 01/01/70 00:00 | |
Look closely at graphical LCDs. | 01/01/70 00:00 |