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Messages - Tim_Cole

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TFTs / NHD-7.0-800480EF-20 Pinout
« on: December 16, 2014, 11:17:42 PM »
As I understand it, the user MPU interfaces with this controller as if it were an SSD-1963 controller. However, there are a few details that the NHD-7.0-800480EF-20 spec doesn't seem to cover.

1) Does the MPU see the SSD-1963 TE signal, or does the NHD-7.0-800480EF-20 handle tearing control?

2) B/L Enable: this is described as  "Power Supply." The two descriptions don't seem to match, but I do want to control the backlight. How should the pin be used? In particular, what current does the MPU pin have to source or sink?

3) DISP: An early reply to a customer indicated this pin (and the B/L Enable) can be left unconnected. However, can I use this pin to temporarily blank the display?

Tim Cole

Character LCDs / Re: HD44780 8-bit Initialization Rationale
« on: September 16, 2014, 01:55:51 PM »
That makes sense - whack the sucker with a stick to make sure you've got its attention.  It certainly won't hurt, but I'd wondered if there was some other subtlety. Thanks!

Character LCDs / HD44780 8-bit Initialization Rationale
« on: September 15, 2014, 12:56:50 AM »
Greetings all,
I'm using an old vanilla HD44780-style LCD screen, and for the first time, I'm using 8-bit mode. Every piece of example code I've shows setting 8-bit interface mode by writing 0x30 three times, with varying delays between writes. The hex value makes perfect sense, I won't argue with a method that's known to work, but why do you write it three times?

Cheers, Tim

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