NP-41 Emulator (may be)

[jch]

(01-29-2016 02:59 PM)Chris Chung Wrote:  The next PCB design is not yet finish and it can accommodate
. UART (need external USB-Serial cable).
. programming interface, TI Spy-Bi-Wire (i.e. simple Jtag)
. 2 levels (2 GPIO pins) of LCD backlight brightness.
. piezo buzzer.
. micro SD card.
. SPI flash.
. 2 x 8 pin socket that draws out the SPI pins and some others.

Chris, this will really be a 'Swiss Army Calc'. Looks like your PCB will be a masterpiece !
I don't know if the MCU has Timer or PWM capabilities, but you may use only one PWM pin for LCD backlight ?
And, though I still have some computers with real serial Com port, I wan't ask for MAX232 RS232C level translators ;-).

Jean-Christophe.