ML9204-xx

OKI Semiconductor ML9204-xx GENERAL DESCRIPTION PEDL9204-02 Issue Date: Oct. 12, 2004 Preliminary 5 × 7 Dot Character × 24-Digit × 2-Line Display Controller/Driver with Character RAM (Built-in Key Scan) The ML9204-xx is a 5 × 7 dot matrix type vacuum fluorescent display tube controller driver IC which displays characters, numerics and symbols of a maximum of 24 digits × 2 lines. Dot matrix vacuum fluorescent display tube drive signals are generated by serial data sent from a micro-controller. A display system is easily realized by internal ROM and RAM for character display. Built-in key scan for 3-channel encoder type rotary switch and 5 × 6 matrix key switch allow the user to receive each switch input. The ML9204-xx has low power consumption since it is made by CMOS process technology. –01 is available as a general-purpose code. Custom codes are provided on customer’s request. FEATURES : 3.3 V±10% or 5.0 V±10% Logic power supply (VDD) VFD tube drive power supply (VSEG, VCOM ) : 20 to 60 V VFD driver output current (VFD driver output can be connected directly to the VFD tube. No pull-down resistor is required.) Segment driver (SEGA1 to A35, SEGB1 to B35) Only one driver output is high : –5 mA (VSEG = 60 V) All the driver outputs are high : –350 mA (VSEG = 60 V) Segment driver (ADA, ADB) : –15 mA (VSEG = 60 V) Grid driver (COM1 to 24) : –25 mA (VCOM = 60 V) Content of display SEGA1 to SEGA35 and ADA CGROM_A : 5 × 7 dots 240 types (character data) CGRAM_A...