ML9204 Datasheet, PDF (1/41 Pages) OKI electronic componets – 5 X 7 Dot Character X 24-Digit X 2-Line Display Controller/Driver with Character RAM (Built-in Key Scan)

OKI Semiconductor
ML9204-xx
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)
GENERAL DESCRIPTION
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
• Logic power supply (V_DD)
: 3.3 V±10% or 5.0 V±10%
• VFD tube drive power supply (V_SEG, V_COM ) : 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
All the driver outputs are high
• Segment driver (ADA, ADB)
• Grid driver (COM1 to 24)
: –5 mA (V_SEG = 60 V)
: –350 mA (V_SEG = 60 V)
: –15 mA (V_SEG = 60 V)
: –25 mA (V_COM = 60 V)
• Content of display
SEGA1 to SEGA35 and ADA
• CGROM_A
: 5 × 7 dots 240 types (character data)
• CGRAM_A
: 5 × 7 dots 16 types (character data)
• ADRAM_A
: 24 (display digit)× 1 bit (symbol data; can be used for a cursor.)
• DCRAM_A
: 24 (display digit) × 8 bits (register for character data display)
SEGB1 to SEGB35 and ADB
• CGROM_B
: 5 × 7 dots 240 types (character data)
• CGRAM_B
: 5 × 7 dots 16 types (character data)
• ADRAM_B
: 24 (display digit)× 1 bit (symbol data; can be used for a cursor.)
• DCRAM_B
: 24 (display digit) × 8 bits (register for character data display)
• Display control function
• GCRAM
: Simultaneous output of COM1 to 24 can be set in 1 grid.
• Display digits
: 1 to 24 digits (9- to 24-bit arbitrary setting)
• Display duty (brightness adjustment) : 0/1024 to 960/1024 stages
• All lights ON/OFF
• 5 interfaces with microcontroller:DI/O, CS, CP, RESET, INT
• Built-in key scan circuit for 5 × 6 matrix key switch
• Built-in key scan circuit for 3-channel encoder type rotary switch
• Built-in oscillation circuit
Crystal oscillation or ceramic oscillation: 4.0 MHz (Typ)
• Standby function
Inhibiting the oscillator circuit provides low power consumption.
• Package options:
128-pin plastic QFP (QFP128-P-1420-0.50-K) (ML9204-xxGA)
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