ML63295A User’s Manual
Chapter 1
Overview
1 – 2
i. Ports
Input ports:
Selectable as input with pull-up resistor/input with pull-down resistor/high impedance input.
Output ports:
Selectable as P-channel open drain output/N-channel open drain output/high-impedance output/CMOS
output.
I/O ports:
Selectable as input with pull-up resistor/input with pull-down resistor/high impedance input.
Selectable as P-channel open drain output/N-channel open drain output/high impedance output/CMOS
output.
Can be interfaced with external peripherals that use a different power supply than this device uses
(provided with V
DDI as the port-dedicated power supply pin and VDDE as the power supply for the MD
and MDB pins).
Number of ports:
Input port:
2 ports
× 4 bits
Output port:
6 ports
× 4 bits
Input-output port: 6 ports
× 4 bits
j. Melody output
Melody frequency:
529 Hz to 2979 Hz
Tone length:
63 varieties
Tempo:
15 varieties
Melody data:
Stored in program memory
Buzzer driver signal output:
4 kHz
k. LCD driver
Number of segments: 3072 Max. (96 SEG.
× 32 COM.)
Duty:
Selectable as 1/2, 1/4, 1/6, 1/8, 1/10, 1/12, 1/14, 1/16, 1/18, 1/20, 1/22, 1/24, 1/26,
1/28, 1/30, or 1/32 duty
Bias:
Selectable as 1/5 or 1/6 bias (regulator built-in)
Frame frequency:
ex. 64 Hz (at 1/32 duty), 128 Hz (at 1/16 duty), 256 Hz (at 1/8 duty), 512 Hz (at
1/4 duty), 1024 Hz (at 1/2 duty)
Contrast:
16 levels adjustable
Display modes:
Selectable as all-ON mode/all-OFF mode/power down mode/normal display
mode
l. Multiplication/division circuit
Multiplication:
(8 bits)
× (8 bits) → Product (16 bits)
Division:
(16 bits)/(8 bits)
→ Quotient (16 bits), Remainder (8 bits)
m. System reset function
System reset through RESET pin
System reset by power-on detection
System reset by low-speed oscillation halt
n. Battery check
Low-voltage supply check
The value of the judgment voltage is selected by the software (by setting the LD1 and LD0 bits of
BLDCON)
LD1
LD0
Judgment voltage (V)
Remarks
1
0
4.5
±0.1
Ta = 25°C
1
5.1
±0.1
Ta = 25°C