NXP Semiconductors OM6290, User Manual, Page: 10 / 30

NXP Semiconductors
UM10300
User Manual OM6290
UM10300_1 © NXP B.V. 2008. All rights reserved.
User manual Rev. 1.0— 8 August 2008 10 of 30
ƒ manufactured in silicon gate CMOS process
ƒ AEC-Q100 compliant (TQFP64).
3.1.3 Block diagram
001aab131
LCD
VOLTAGE
SELECTOR
CLOCK SELECT
AND TIMING
BLINKER
TIMEBASE
OSCILLATOR
INPUT
FILTERS
I
2
C-BUS
CONTROLLER
POWER-ON
RESET
CLK
SYNC
OSC
SCL
SDA
SA0
BACKPLANE
OUTPUTS
DISPLAY
CONTROLLER
BP0
56
55
54
47
46
49
V
DD
48
45
44
53
50 51 52
1 2 3
BP2 BP1 BP3
DISPLAY SEGMENT OUTPUTS
DISPLAY REGISTER
OUTPUT BANK SELECT
AND BLINK CONTROL
4 to 43
S0 to S39
A0 A1 A2
PCF8576DT
LCD BIAS
GENERATOR
V
SS
V
LCD
COMMAND
DECODER
WRITE DATA
CONTROL
DISPLAY
RAM
40
×
4-BIT
DATA POINTER AND
AUTO INCREMENT
SUBADDRESS
COUNTER
Fig 2. Block diagram of PCF8576D
3.2 Character Driver PCF2119
3.2.1 General Description
The PCF2119x is a low power CMOS LCD controller and driver, designed to drive a dot
matrix LCD display of 2-line by 16 or 1-line by 32 characters with 5 x 8 dot format. All
necessary functions for the display are provided in a single chip, including on-chip
temperature compensated generation of LCD bias voltages, resulting in a minimum of
external components and lower system current consumption. The PCF2119x interfaces
to most microcontrollers via a 4 or 8-bit bus or via the 2-wire I
2
C-bus. The chip contains a
character generator and displays alphanumeric and kana (Japanese) characters. The
letter ‘x’ in PCF2119x characterizes the built-in character set. Various character sets can
be manufactured on request. The character set of the PCF2119 on the demo board is ‘S’.
A similar device is the PCF2113 (2-line by 12 or 1-line by 24 char 120 icons).