Hi,
Is there any efficient way to connect a serial 5x7 AlphaNumeric Display to the L138 or do I have to use GPIO?
I was thinking of a display from AVAGO - HCMS3901
Pin Function Description:
RESET (RST) - Sets Control Register bits to logic low. The Dot Register contents are unaffected by the
Reset pin. (logic low = reset; logic high = normal operation).
DATA IN (DIN) - Serial Data input for Dot or Control Register data. Data is entered on the rising edge of the Clock input.
DATA OUT (DOUT) - Serial Data output for Dot or Control Register data. This pin is used for cascading multiple displays
.
CLOCK (CLK) - Clock input for writing Dot or Control Register data. When Chip Enable is logic low, data is entered on the rising Clock edge.
REGISTER SELECT (RS) - Selects Dot Register (RS = logic low) or Control Register (RS = logic high) as the
destination for serial data entry. The logic level of RS is latched on the falling edge of the Chip Enable input.
CHIP ENABLE (CE) - This input must be a logic low to write data to the display. When CE returns to logic
high and CLK is logic low, data is latched to either the LED output drivers or a Control Register.
OSCILLATOR SELECT - Selects either an internal or external display oscillator source. (SEL) (logic low = External
Display Oscillator; logic high = Internal Display Oscillator).
OSCILLATOR (OSC) - Output for the Internal Display Oscillator (SEL = logic high) or input for an External
Display Oscillator (SEL = logic low).
Thanks a lot,
