ML2002 Preliminary
ii) Oscillator
The LCD driving signal of ML2002 is clocked either by the built-in oscillator, crystal oscillator or from
an external clock.
a) Internal clock
When the internal oscillator is used, BIOEN should be connected to GND and the OOUT should be
connected to FIN. The internal oscillator will oscillate at 32 kHz and the frequency is independent in the
range of 2.5V < VDD < 6.0V . Then connect OOUT to FIN.
b) Crystal clock
When using the crystal oscillator, BCOEN is connected to GND, then connect
the crystal to OSC+, and OSC-. Then connect OSC- to FIN. The OSC+ and
OSC- should connect as:
c) External clock
When using an external clock, BCOEN & BIOEN is connected to VDD then connects the external clock
to FIN.
iii) Timing
ML2002 have several frequencies of clock signal for the users to choose for the LCD display clock (ie.
LCLK) and the blink clock (ie.BCLK). They include the following clock signals:
Frequency of Clock Signal at FIN = 32 kHz
Actual Divider of FIN
1/256(1/2 Duty) or 1/128(Static)
1/128(1/2 Duty) or 1/64(Static)
1/8192
Target Input Pin
LCLK
256/128 Hz
128/64 Hz
4 Hz
BCLK
2 Hz
1 Hz
1/16384
1/32768
iv) Segment outputs
ML2002 has 48 segment outputs which should be connected directly to the LCD. If less than 48 segments
a re required, the unused segments should be left open circuit.
v) Common outputs
ML2002 consists of 2 common signals (ie. COM1A & COM1B). The common outputs should be left
open-circuit if the outputs are unused. Users can disable the COM1A and COM1B by connecting the
CEN1A and CEN1B to VDD, respectively. The common outputs will change to GND after disabling it.
vi) Blink
ML2002 has a blink function that users shall connect BEN to GND and input the blink clock (ie. BCLK)
either by connecting ML2002 output clock signal from Frequency Divider or an external clock signal.
Users shall disable blink function by connecting BEN to VDD.
P5/29
Preliminary, April 2007
MINILOGIC [ MINILOGIC DEVICE CORPORATION LIMITED ]
