5 x 7 Dot Character x 24-Digit x 2-Line Display
Controller/Driver with Character RAM (Built-in Key Scan)
Documents
| » PDF of this Data Sheet (314 KB) is
available. |
ML9204.pdf
|
Description
The
ML9204-xx is a 5 x 7 dot matrix type vacuum fluorescent display tube controller
driver IC which displays characters, numerics and symbols of a maximum of 24
digits x 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 x 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 (VDD) : 3.3 V±10% or 5.0 V±10% |
| » |
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 x 7 dots 240 types (character data) |
| » |
CGRAM_A : 5 x 7 dots 16 types (character data) |
| » |
ADRAM_A : 24 (display digit)x 1 bit (symbol data; can be used
for a cursor.) |
| » |
DCRAM_A : 24 (display digit) x 8 bits (register for character
data display) | SEGB1 to SEGB35 and ADB
| » |
CGROM_B : 5 x 7 dots 240 types (character data) |
| » |
CGRAM_B : 5 x 7 dots 16 types (character data) |
| » |
ADRAM_B : 24 (display digit)x 1 bit (symbol data; can be used
for a cursor.) |
| » |
DCRAM_B : 24 (display digit) x 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 x 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) |
|
|
|
