Sharp OZ-9600II User Manual

OZ-9600 IT
TQ-9200
2-2. LCD driver (LH1552F, LH1553F)
1) Introduction
The LCD driver consists of six segment driver (LH1552F) and a com-
mon driver (LH1553F). The common driver has 240 internal driver
circuits and operates under the display duty of 1/240, The segment
driver has 168 internal driver circuits.
To abate the CPU load, connection is made only to the common
driver, and the common driver transfers data with a several (8 maxi-
mum) segment drivers. The 8-bit display data received from the CPU
are sent to the common driver, and sent the segment display RAM
"after completing processing within the common driver.
Common
driver
Maximum
® Instructions
@ Window function: Allows to setup a maximum 16 windows.
@® Data block transfer function: Used to write continuing data and to
send data blocks.
@® Four rules of arithmetic operation: Four rules of arithmetic opera-
tion of write data with LCD display data (loop instruction), SET,
AND, OR, EXOR, and NOT operation (inverse).
@ Masking: Masks the write and read data.
© Automatic address increment and decrement functions: Can inde-
pendently increment or decrement 1 to 8 automatically towards
direction X or Y after accessing the write or read address.
© Vertical write and horizontal write: Data may be accessed vertical-
ly or horizontally.
For vertical direction, the MSB is for 8 bits on a column.
For horizontal direction, the MSP is for 8 bits on a row.
8bit
MSB
MSB
8bit
@ Internal droop circuit: To prevent a drooping phenomenon, the
FRM frequency can be varied.
Address conversion feature: When an absolute address is ac-
cessed by the CPU, the common driver distinguishes to which
segment driver to be addressed, and converts it to the absolute
address for accessing.
Common driver
© Common output impedance: 3.0KQ, maximum.
© Internal common LCD display drive circuit: 240 circuits.
© Window RAM capacity: 688 bits.
© Segment driver
Segment output impedance: 3.0KQ, maximum.
o
°
°
°
°
°
Direct display of RAM data by the internal display RM
Data high: Bit active
Data low: Bit inactive
Display RAM capacity: 240 x 168 = 40320 bits (5040 bytes)
Internal segment LCD display drive circuit: 168 circuits
Display duty: 1/240
© CMOS process
© Power supply
GND = 0VVec (logic) = 3.8V~6.5V
VEE (LCD) = 10.0~30.0v
© PKG
Segment: 217 pins, tab film
Common: 325 pins, tab film
2) Block diagram (LH1552F segment driver)
Supplied from the common driver
RAM
240 x 168 BITS
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Fig.4 LH1552F block diagram

Sharp OZ-9600II Specifications

General

Brand	Sharp
Model	OZ-9600II
Category	Organizer
Language	English