OKI Semiconductor
ML63611A
GENERAL DESCRIPTION
FEDL63611A-01
Issue Date: Jan. 28, 2004
4-Bit Microcontroller that Operates under Ultra-Low Supply Current, with RC Oscillation Type
A/D Converter Built-In
The ML63611A is a CMOS 4-bit microcontroller using Oki’s original CPU core nX-4/250.
The ML63611A is provided with the mask options of eight items of selection including (1.5 V or 3.0 V)
power supply specifications and (With or Without) the regulator circuit for the LCD bias reference voltage.
When a 3.0 V power supply specification is selected, the halver circuit can be used to decrease power
consumption. The halver circuit cannot be used when a 1.5 V power supply specification is selected.
When “With the regulator circuit for the LCD bias reference voltage” is selected, the LCD bias reference
voltage will be generated based on the output voltage of the regulator circuit. When “Without the regulator
circuit for the LCD bias reference voltage” is selected, the LCD bias reference voltage will be generated
based on the power supply voltage; for this reason, the LCD bias voltage decreases as the power supply
voltage decreases, causing the display density of the LCD panel to thin down.
The ML63611A has incorporated in it an 8K-word program memory, a 1K-nibble data memory, four input
ports, four output ports (only when the mask option of LCD driver pins is selected), 16 I/O ports, a melody
circuit, a serial port, four 8-bit timers, and a 64-segment LCD driver (60 segment lines and 4 common lines,
max.). (A part of the SEG pins can also be selected as output port pins or COM pins depending on the mask
option.)
!
Note:
In this datasheet, for convenience of description, the symbols OPTION A, OPTION B, OPTION C, and
OPTION D are used in accordance with the mask option selection of a power supply specification (1.5 V or 3.0
V) and the regulator circuit for the LCD bias reference voltage (With or Without), as shown below.
•
OPTION A:
•
OPTION B:
•
OPTION C:
•
OPTION D:
1.5 V power supply specification (halver circuit disabled), without the regulator circuit for the
LCD bias reference voltage
1.5 V power supply specification (halver circuit disabled), with the regulator circuit for the
LCD bias reference voltage
3.0 V power supply specification (halver circuit enabled), without the regulator circuit for the
LCD bias reference voltage
3.0 V power supply specification (halver circuit enabled), with the regulator circuit for the
LCD bias reference voltage
FEATURES
The ML63611A has the following features.
a. Extensive instruction set
•
407 instructions
Transfer, rotate, increment/decrement, arithmetic operations, compare, logic operations, mask
operations, bit operations, ROM table reference, stack operations, flag operations, jump,
conditional branch, call/return, control
b. Wide variety of addressing modes
•
Indirect addressing mode for 4 types of data memory with current bank register, extra bank
register, HL register and XY register
•
Data memory bank internal direct addressing mode
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