i bought a 16x32 dotmatrix single colour (red) from a third party, no documentation, no information on the BUS interface. i have been having trouble to get character display on it.
Feature of the display. 16 rows, 32 columns.
the components i could pick from the back are 74HCT595 column driver, the rows are scan using AMP4953. row the row are bridge as follows row 1-9, row 2-10, row 3-11, row 4-12, row 5-13, row 6-14, row, 7 -15, 8 -16.
74HC138 decoder for selecting rows through AMP4953. pin 5 of the decoder is used to blank the display.

the BUS interface: Shift clock (RCL $ SCL) for 74HCT595, the serial data input,
the board is a product of EVTECK from china