pcf2119x-2 NXP Semiconductors, pcf2119x-2 Datasheet - Page 9

• Manufacturer Part Number: pcf2119x-2
• Description: Controllers/drivers
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7.12
The Character Generator ROM generates 240 character
patterns in a 5
Figure 6 to 8 show the character sets that are currently
implemented.
7.13
Up to 16 user defined characters may be stored in the
Character Generator RAM. Some CGRAM characters
(see Fig.17) are also used to drive icons (6 if icons blink
and both icon rows are used in the application; 3 if no blink
but both icon rows are used in the application; 0 if no icons
are driven by the icon rows). The CGROM and CGRAM
use a common address space, of which the first column is
reserved for the CGRAM (see Fig.6). Figure 9 shows the
addressing principle for the CGRAM.
7.14
The cursor control circuit generates the cursor (underline
and/or cursor blink as shown in Fig.5 at the DDRAM
address contained in the address counter.
When the address counter contains the CGRAM address
the cursor will be inhibited.
28. August 2000
LCD controllers/drivers
Character Generator ROM (CGROM)
Character Generator RAM (CGRAM)
Cursor control circuit
8 dot format from 8-bit character codes.
cursor display example
5 x 7 dot character font
Fig.5 Cursor and blink display examples.
cursor
9
7.15
The timing generator produces the various signals
required to drive the internal circuitry. Internal chip
operation is not disturbed by operations on the data buses.
7.16
The PCF2119x contains 18 row and 80 column drivers,
which connect the appropriate LCD bias voltages in
sequence to the display in accordance with the data to be
displayed. R17 and R18 drive the icon rows.
The bias voltages and the timing are selected
automatically when the number of lines in the display is
selected. Figures 10 to 13 show typical waveforms.
Unused outputs should be left unconnected.
blink display example
Timing generator
LCD row and column drivers
alternating display
MGA801
PCF2119x-2
Product specification