E2B0032-27-Y3
¡ Semiconductor
MSM6222B-xx
¡ Semiconductor
SEGMENT DRIVER
This version: Nov. 1997
MSM6222B-xx
Previous version: Mar. 1996
DOT MATRIX LCD CONTROLLER WITH 16-DOT COMMON DRIVER AND 40-DOT
GENERAL DESCRIPTION
The MSM6222B-xx is a dot matrix LCD controller which is fabricated in low power CMOS
silicon gate technology. Character display on the dot matrix character type LCD can be
controlled in combination with a 4-bit/8-bit microcontroller. This LSI consists of 16-dot
COMMON driver, 40-dot SEGMENT driver, display data RAM, character generator RAM,
character generator ROM and control circuit.
The MSM6222B-xx is the equivalent of Hitachi's HD44780. There is, however, a slight difference
between the two devices as described in the table on the last page.
The MSM6222B-xx has the character generator ROM that can be programmed by custom mask.
MSM6222B-01 is a standard version having 160 characters with lowercase (5 x 7 dots), and 32
characters with uppercase (5 x 10 dots) in this ROM.
FEATURES
• Easy interface with an 8-bit or 4-bit microcontroller.
• Dot matrix LCD controller/driver for lowercase (5 x 7 dots) or uppercase (5 x 10 dots).
• Automatic power ON reset.
• COMMON signal drivers (16) and SEGMENT signal drivers (40).
• Can control up to 80 characters when used in combination with MSM5259.
• Character generator ROM for 160 characters with lowercase (5 x 7 dots) and 32 characters with
uppercase (5 x 10 dots).
• Character patterns are programmable by character generator RAM. (Lowercase: 5 x 8 dots,
8 kinds, uppercase: 5 x 11 dots, 4 kinds).
• Oscillation circuit for external resistor or ceralock.
• 1/8 duty (1 line; 5 x 7 dots + cursor), 1/11 duty (1 line; 5 x 10 dots + cursor), or 1/16 duty (2
lines; 5 x 7 dots + cursor), selectable.
• Clear display even at 1/5 bias, 3.0V LCD driving voltage.
• Package options:
80-pin plastic QFP (QFP80-P-1420-0.80-L) (Product name: MSM6222B-xxGS-L)
80-pin plastic QFP (QFP80-P-1420-0.80-BL) (Product name: MSM6222B-xxGS-BL)
xx indicates code number.
1/45
¡ Semiconductor
MSM6222B-xx
PIN DESCRIPTIONS
Symbol
R/W
RS
E
DB
0
- DB
7
OSC
1
, OSC
2
COM
1
- COM
16
SEG
1
- SEG
40
DO
CP
L
DF
V
DD
GND
V
1
, V
2
, V
3
, V
4
, V
5
Read/write selection input pin.
"H" : Read, and "L" : Write
Register selection input pin.
"H" : Data register, and "L" : Instruction register
Input pin for data input/output between CPU and MSM6222B-xx and for instruction
register activation.
Input/output pins for data send/receive between CPU and MSM6222B-xx.
Clock oscillating pins required for internal operation upon receipt of the LCD drive signal
and CPU instruction.
LCD COMMON signal output pins.
LCD SEGMENT signal output pins.
Output pin to be connected to MSM5259 to expand the number of characters to be
displayed.
Clock output pin used when DO pin data output shifts inside of MSM5259.
Clock output pin for the serially transferred data to be latched to MSM5259.
The alternating current signal (Display Frequency) output pin.
Power supply pin.
Ground pin.
Bias voltage input pins to drive the LCD.
Description
5/45
Analogue and Mixed Signal
京公网安备 11010802033920号
EEWORLD
