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ML2002-1U Arkusz danych(PDF) 5 Page - Minilogic Device Corporation Limited |
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ML2002-1U Arkusz danych(HTML) 5 Page - Minilogic Device Corporation Limited |
5 / 13 page P5/13 Preliminary, November 2008 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 (32 KHz) or LCLK (125Hz) 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 Target Input Pin 256/128 Hz 1/256(1/2 Duty) or 1/128(Static) 128/64 Hz 1/128(1/2 Duty) or 1/64(Static) LCLK 4 Hz 1/8192 2 Hz 1/16384 1 Hz 1/32768 BCLK iv) Segment outputs ML2002 has 48 segment outputs which should be connected directly to the LCD. If less than 48 segments, 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 A CEN1 and B CEN1 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. |
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